Pros: Good quality. Easy setup. Ability to switch KB/Mouse and Audio and USB peripheral ports independently very useful.

Cons: Something of a bait and switch. Specs say: "DVI Digital and analog monitor support...". The 5 ports are DVI-I. HOWEVER, they went cheap and put DVI-D cables in the box! If you atually want to follow the specs and hook up an analog monitor and/or analog cards, YOU HAVE TO GO SPEND $80+ EXTRA TO GET CABLES WITH ANALOG SIGNAL PINS.

Overall Review: All the spec say on the cables is: "4 x 6' custom cables". If IOGear/Aten are going to make this type of internal decision, they should be up front and say: "(Requires aftermarket DVI-I cables.)" or make two models; one for pure digital all the way through and one for digital/analog mixed. People need an upgrade path with backward compatibility.

Pros: Best 4-PC KVM on Newegg! I have 2 PCs and a laptop in docking station connected to my 22” LCD (1680X1050 resolution). This leaves me a spare set of ports when working on another PC. I’m also using a Logitech MX Revolution mouse and diNovo Edge keyboard in this setup with no issues. Everything is recognized fine when switching between CPUs; you just have to wait a second for it to see your devices (you are reconnecting USB ports when you switch PCs, after all). Keep in mind any USB keyboard will work in the console port, but if it has special features like mine (including most apple keyboards), you’ll need to plug it into the peripheral USB port to work completely. Otherwise only the basic 104 buttons will work. This is not a negative on the product since this is fully documented on their site and in the manual. The peripheral USB ports recognized everything I tried out and worked on multiple PCs flawlessly.

Cons: USB ports are version 1.1. Granted, most of what you would plug into these ports don’t need USB2.0 (please don’t plug external hard drives into any KVM or you’re asking for trouble) but this is 2008, not 1998 IOGear. Other reviewers here obviously do not do their research before buying a product. The manual explains how to setup the switch for an Apple keyboard, I tested, it works. The IOGear site states clearly that they ship DVI-D cables with the switch, not DVI-I. This is also the case with almost every other KVM maker I looked at. If you have a VGA only monitor, why are you buying a DVI switch?!? There are VGA KVMs with all the same features if you need it. Otherwise pay extra for the special cables you need.

Overall Review: This KVM supports DVI-I display ports, so if your LCD has both DVI-D and VGA ports instead of DVI-I, and you want to use both when needed, Newegg has the cable to convert both into DVI-I http://www.newegg.com/Product/Product.aspx?Item=N82E16812214014. You’ll also need the appropriate cable on the PC side, too. But such is the cost of having it both ways.

Comments: As the earlier reviewer states, it switches video with great resolution, but USB devices stutter with incredibly consistent frequency. I have tried basically five mice and three keyboards, all to no avail. It took some time to find out that my three servers, all Asus K8N-DLs (read NForce4 mobos), were incompatible with the KVM. Oh well, the hunt for a good 4-port DVI KVM continues...

Pros: DVI, 4 ports, comes with cables, sturdy construction. Works great to switch back and forth between Windows for gaming, and Ubuntu for everything else. No serious issues at all on either platform.

Cons: I've noticed that after switching via hotkeys, sometimes the the port number you pressed to switch to will be repeated over and over until you mess around with the focus. This would probably be fixed with updated firmware, but I'm to lazy to update it.

Overall Review: This is a good buy. I've owned other KVM switches, this is my first DVI one. It's really awesome. Outstanding picture on my Acer 22" 1680x1050. The 2 port model would probably be just as good, but I went with the 4 port because hey... you know know when it might come in handy. :)

Pros: Four decent 6' long cables. Good auto-scan time. Works well with my 24" LCD at 1920 x 1200. No noticeable problems with picture or audio quality. Solid construction with easy access to the buttons up front. My Saitek Eclipse II keyboard and Logitech MX-518 mouse fully work with this switch. Firmware upgradeable. Plenty of options for partial switching.

Cons: It is tricky to find a good spot for this box and still be able to reach the buttons. I am using all my ports, so cable clutter is an issue but that is expected and is better than a couple of monitors, keyboards, and mice.

Overall Review: Requires 4 or more key-presses to do switching via keyboard but pushing a physical button for about 3 or 4 seconds will do the same job. The LED indicators under the clear buttons clearly indicate port status -- dim orange for connected ports, bright orange for active port, and bright green for active USB/Audio port. I am very pleased with how this switch works.

Pros: If I could give this thing six eggs, I would. 1. While this unit may have trouble with some nForce4 chipsets, it works great with mine (ASUS A8N-SLI Deluxe board). 2. The picture is excellent and the unit is very responsive. The KVM I had before this one always took quite some time before I got interactivity with the target console. This one is almost immediate. 3. The firmware is all kinds of nifty. You plug your keyboard into the proper USB port and you get keystroke control of the KVM, including the ability to map it to Mac keyboards and to turn off that annoying little speaker that every KVM has (I know I did). 4. Tech support was very helpful and receptive and knew what I was talking about; the person with whom I was speaking was not just flipping through a book. Excellent buy! IOGear has made a customer of me.

Cons: As mentioned in other reviews, the cables shipped with this unit are DVI-D, not DVI-I. This is a bit of a shame, as it requires one to buy adapters and cables if one wants to connect analog video cards to it. However, my monitor won't accept a DVI-I cable anyway, so I guess it's not that big of a deal for me. :)

Overall Review: Make sure that you connect the keyboard and mouse to the front panel ports and not to the back; my old KVM wanted them in back and so I placed them there out of habit. This caused the keyboard to be unresponsive during bootup (hence the call to the excellent tech support department).

Pros: I have a bunch of computers at home (a powerpc mac, a core 2 quad pc running vista, and a dual-core opteron running linux) and have been on the prowl for a KVM for a while. I bit the bullet recently and this one has been pretty good. The last good KVM that I owned was a 4-port VGA+PS/2 from Belkin (an old-skool OmniView). This KVM works like that one did -- it works, and isn't incredibly glitchy.

Cons: Most of the problems I run into with this KVM aren't really the KVM's fault. The problems include: Booting up Ubuntu Ibex but switching away to another machine before XWindows starts causes the Ubuntu box to have its screen resolution messed up (it puts the resolution maximum at 1024x768 until I reboot the box...restarting the X Server doesn't help). Starting up a game under Vista and then switching away to another computer while it loads causes similar screen resolution issues. Also under Vista this seems to throw the sound card for a loop, and audio often stops working. These aren't show-stoppers by any stretch, just minor annoyances. They could be fixed if the KVM sent the monitor's actual identifier string over all of the DVI links, but alas it doesn't (it might not be possible to do this even with a firmware upgrade with the KVM's chips).

Overall Review: All around I find this to be a solid KVM. It works well under a variety of operating systems and hardware (I should mention that I use an apple keyboard with it). It works well at my monitor's native resolution (1680x1050). KVMs are not especially cheap hardware, but I find them to be oh-so-useful as I switch computers often just to mess around with software at home. I would buy another one if I had another home office.

Pros: The price is great for a 4-port DVI/USB KVM. Includes all cables needed, and has a small footprint. I use this KVM with one PC, two Suns, and one Mac, and everything works correctly.

Cons: The KVM is somewhat hot to the touch, I wonder if that will affect its lifespan. You have to have the KVM focus on the machine that is booting, or your video will not be correct. The Suns will send the console to a serial port if the KVM focus is away during boot. I initially had issues with the usb mouse taking 5-10 seconds to appear to the OS after switching to a new port. The PC was the most unreliable about recognizing the mouse--I'd have to reset the KVM using the hot keys, and switch back and forth between different ports, and eventually the mouse would come back. This was quite annoying, and I was very close to returning the KVM. I finally tried leaving the keyboard in the front port, and moving the mouse to the rear "hub" port, which solved all my problems. I don't know why the mouse is happier in the hub instead of the console port, but I don't have to fight the KVM to get the mouse back in this configuration.