StarTech USB2DVIE2 USB DVI External Dual or Multi Monitor Video Adapter

Pros: Works with Windows Vista and 7

Cons: Not compatible with Windows XP

Other Thoughts: Confirmed with Startech customer support that there is no support for XP, after a lot of back-and-forth. They are aware that they don't list system requirements, and do not want to change. They claim it is an issue with XP, yet other adapter brands are some how able to manage.

For what it's worth, the drivers included with the box work better on XP than the ones on the website. However, you'll have to restart your computer every time you unlock it or bring it back from a sleeping state, in order to get your 2nd monitor back.

Pros: Easy to use & Install

Now with Windows 8 Support from the website

Very good customer support

Product itself is well built

Cons: Maximum supported size is 1680 x 1050, it would have been nice for 1080P support which is found on the more expensive USB 3.0 version

Other Thoughts: These are not for display video or moving scenes, expect flickering or tearing.

Pros: Price isn't bad, specially for what I ended up paying for the 3 that I have. Supports multiple wide screen and stand screen aspect ratios, easy to install, even worked for my Windows XP 64 bit edition workstation.

Cons: You can DEFINATLEY tell the difference in refresh and response times on the monitors I have conencted to them compared to the response time I have my other 2 monitor connected to running off a 8800GTS. I don't use this system for gaming so it's not that big of a deal but this works great for someone wanting to add a second, thrid, or more monitors to a computer with only 1 VGA/DVI output.
When I reboot my computer, I have to reconfigure my monitor order. I have not figured out how to save the display order, and sometimes I have to re-activate the monitors through the software provided with the device. That's about the worse thing I can say about them.

Other Thoughts: I got such a good deal on the three I have that I figured I couldn't got wrong. (got them for $15 each from a local store going out of business) so I doubt anyone could find them for less than what Newegg sells them for.

I'm running a total of 5 monitors off my main workstation, 2x 20" WS LED/LCDs. 2x 21.5" WS LCDs, and 1 19" 4:3 as a control monitor for cmd prompt, nero, grabit, and other utilites. I have the 4x WS LCD's on a quad stand and it looks AMAZING!!! I love the 5 displays at once. I was shooting for just a quad setup, but ended up with a 3rd device and already had the monitor. My entire setup (mainly because I got such great deals from that local store going out of business) ended up costing about $450 including all for monitors, the stand, 3 of these devices, and 2x VESAconversion plated for the 20" LED monitors (which I bought on newegg's Black Friday sale) My 3.0GHz Core2Quad and 8GB's of DDR2 1066MHz RAM powers all 5 monitors without issue!!!!!

Pros: It works well. It extended the computer screen. It does what it's supposed to do

Cons: It DOES NOT work with Tradestation. There is an error conflict with a .dll

Pros: Inexpensive, has the 16mb on board video memory. Supports portrait mode. Use it for a 3rd monitor to run a 19" Dell that rotates. Saved a monitor from being donated to put in service!

Cons: You can see lag action when you drag windows across this screen. We're talking milliseconds so it's not pleasing to the eye but definitely is NOT detrimental for work use as a third monitor (or even second). Opening and closing windows, you can tell it's not a dedicated card but it's definitely OK!

Other Thoughts: Pricing is good for this model. I guess Startech has "pro" version that supports Win 7 Aero. Maybe that will fix the millisecond lag action I mentioned above.