Pros: I purchased these from another etailer. I have used them with many many different drives. I just picked up the Samsung 1TB 840 EVO and the speeds are close to 400MB/s. just under for write and over for reads. With my old SATA II Seagates I get 90MB/s so I can't complain. I also use a Seagate Constellation, and several 3.5" drives with them. I have abotu 4 or 5 of them now. I found the USB3.0 micro B connector to be troublesome for me so I have been using these rather than purchasing drive cases, since I can't find a 2.5" case that uses the full size USB 3.0 B connector. The website says MAC not supported, but I only have 2 Macbook Pro Retinas and it works great with both.

Cons: The power supply takes up a huge amount of space on a power strip. The shape of the adaptor is just inconvenient at best. I do not know why adapters shaped this way even exist anymore. I prefer the edison plug to be sideways and the adapter body to be thin enough to plug an entire strip full of these. In fact I have several 3.5" drives and I have to use multiple strips with 2 adapters each, maybe 3 will fit, and that is a hassle.

Overall Review: Worth every cent. For those that wrote negative reviews I think you got a defective unit or you can blame windows. Windows sucks. I spent 12 years being frustrated by windows before moving back to mac OS. I only wish Mac OS could run by default on my windows machines. They would be useful again.

Pros: I used this device with one of my Seagate 1TB 3.5" hard disks and it worked well. The 3.5" hard drive did not power up until it was connected to a USB port, even though I connected the power adapter first. My OCZ SSD worked fine without the AC Power Adapter, I just connected it to one of the USB 3.0 ports. I've only had it a short time, but it seems to work as advertised, it's as fast as the USB port's maximum speed for fast devices like my SSD.

Cons: Short USB 3.0 cable.

Overall Review: Contrary to what I read in the reviews, it will put the 3.5" drive to "sleep" when left unattended, it wakes when you access it. I benchmarked my Seagate 1TB HDD with HD Tune, using this adapter, and it was as fast as the internal SATA 6G connection on my ASUS motherboard.

Pros: Ease of use and low cost, portability, works with any cloning/imaging software

Cons: Very tight pins on the connector: takes a bit of pressure to connect the drive. Lost it's connection to the computer a couple times. Not sure why but the third time it held the connection through 700GB but not a big deal for me.

Overall Review: Made my SSD swaps and build much easier. I'd highly recommend using one for your next drive swap. Don't be discouraged if you get one or two disconnects.

Pros: None

Cons: It doesn't work. I bought this in case of emergency to be able to access hard drives from dead computers. By the time such an emergency arose, the warranty had expired. Took the brand new unit out of the box, plugged it in according to the bad directions on the exceedingly poorly written instruction page. It doesn't do a thing. The drive didn't spin up, and I could not retrieve my files using this piece of garbage. If you want to be able to access a hard drive, buy something else. If you want to own a useless piece of plastic, buy this item.

Pros: Very portable, Works fine

Cons: failed to mention in prior review that it apparently does not support 'sleep' (spin down) using drives which have this feature.

Overall Review: concerning earlier 'con' comments 'Can't use 2 concurrently' issues of non-unique drive identification and display in 'safely remove hardware' task bar pop-up list, despite clear documentation of issue, initial Syba support response was as posted in review, but within a day they got back to me requesting me to RMA the devices as suspect of a 'problematic earlier manufacture issue'. RMA was promptly addressed and back to my P.O.Box within days (I've been away last 6 weeks so slow to pick-up, confirm fix and post update). RMA replacements show as two unique USB devices and can now be independently manipulated in ''safely remove hardware' task bar pop-up.

Pros: Just reliable and always works. I'm sure it will fail eventually, but of the adapters I have, this is the one I pull out because I know its going to work. Have been using for about 8 years now with absolutely ZERO problems. Writing this review because am purchasing a second to use on a temporary backup drive and don't want to be without one available for quick connects and transfers. If your looking for something reliable, don't hesitate, just get this one.

Cons: USB cable isn't all that long, but I haven't had any that were very long. Tight connection on the SATA side, but I like that because it feels solid. Top is curved so can't run a 2.5" drive upside down, but I normally try to keep them flat. External AC adapter is exactly that with an adequately long supply line. I always use because confirms drive has the power it needs to be reliable without depending on USB system.

Overall Review: I do recommend this device. I am buying again. Have only used with HDD and SSD so can't attest to Optical Drive compatibility.

Pros: contrary to other reviews here, both the SATA interface connector & USB are reasonably solid but will still break when handled like a banana by excitable gorilla. transfer speeds are decently within USB3.0 specs, & works just fine with USB2.0. bulky AC adapter ensures adequate juice for 3.5" larger drives.

Cons: does not show the kind of drive connected in USB2.0 environment - instead displays the useless syba chipset model. over-priced for what it delivers.

Overall Review: base of SATA connector housing is not flat - inclined at around 15 degrees. USB cable is not detachable

Pros: Well built. AC Adapter is smaller than I figured it would be. It's cheap. And it seems fast.

Cons: Recognizes my LG Blu Ray burner but it burns up the motherboard on it. It spins up really fast and doesn't do a thing. I have a Dell XPS L702X running out the USB 3.0 line. I have another maker about the same price in another room. No problems running the optical drive without the ac adapter. This one requires it and doesn't work. And the 3.0 cable is built in so it's trickier to find a powered addon. :( Which so far only the ones from a company in the A*** makes such cables. Since I got this for hard drives only it's not a big minus but for others it might be. Now the one in the other room was bought specifically to run a blu ray burner then it would be an issue. So my Con here is in the details. Depends on what you want to run.

Overall Review: Would love to know why it can't run a blu ray burner. But like all Syba's it could be a chipset issue. And such as other companies and their chipsets. I paid $40 for an enclosure once. Ran DVD burners just great. But BD burners? Did weird things with those and the company went nasty on me and refused the warranty. New Egg couldn't help me out either. So I was stuck with a worthless enclosure. Hopefully this will last and Syba's seem to. But the Sata connector is a bit bent and man is that a short cable. Easy to damage a hard drives. They generally don't lie flat but the Syba forces this.