I like the idea that you can put two drives in ...
585752
I like the idea that you can put two drives in a spot that normally only could take one. It would have been nicer if they had slightly bigger headed screws for the 3.5" bay connection. But what they had worked.
766545
I like the fold up feature and the key ring loop. Both handy. Please note that the drive formatted in FAT32, which limits you to storing files under 4GB each. You will need to reformat to NTFS to save larger file sizes.
4228749
My main computer has a mixture of 2TB and 3TB drives in slide-out mobile racks.  I've had no problems cloning any of the three 3TB drives, all partitioned into a single volume each under Windows 7.  Once a week, I remove each of the drives and pop them into the Aluratek duplicator and make a copy to one of a pair of identical SATA drives (labeled Backup 1 and Backup 2.)  I rotate my backups so I always have one backup that's a week old and one that's two weeks old.  One of the backups go into mobile racks in an identical backup computer, while the other backup is stored off-site.

I also do nightly backups to a pair of mirrored 6TB Drobos using TrueImage Home, and my working files during the day are backed up to a pair of mirrored 128GB flash drives using Allway Sync. As you might guess, I don't tend to lose many files.

I'm writing this because yesterday my main computer malfunctioned and damaged some files on two of my internal drives.  After I fixed the problem, I popped my two-week-old backup drives into the computer while the Aluratek copied everything from my one-week backup back onto my internal primary drives.  Today, I'm restored and back to normal, and I've ordered a second Aluratek duplicator.  For $62 more, I can copy two drives simultaneously, which is a cheap convenience. UPDATE:  I have since purchased more of these duplicators and now own a total of four, so I can back up all four of my internal drives at once, overnight.

The only other time I needed what this duplicator does was awhile back when the motherboard of my main computer exploded.  I moved the most recent drives into the hot backup computer and continued working.  It took three weeks for my repair shop to get a replacement motherboard (the system was still under warranty, so it didn't cost me anything), but the only thing I lacked was a backup computer.

I wouldn't risk being without this duplicator.  Backups are slow, but I usually do them overnight.  If I must do them during a working day, I can use one of the backup drives in my main computer while the drive is being copied. The device does not shut down the drives when the copying is finished, so I always power it down and let them cool off before removing from the duplicator.  It works fine with my 3TB drives.  When copying from a smaller drive to a larger drive you need to extend the partition to the unused space to regain all the capacity.  The hardest part about using this product is that you must remember to insert the source and target drives in the right slots and not reverse them (D'oh!)I put red and green stickers next to the slots and remember NOT to put my source drive into the one with the red sticker.
2631683
I like this drive because it is big enough to make my computer think it is another hard drive.
that makes it easy to transfer files on the fly.
1350048
I thought about buying a different brand - maybe Samsung or Asus, but realized that almost all other brands require the use of TWO USB ports to power the drive as opposed to the one that the Superdrive requires. It's a about a $40 premium that you'll pay for this convenience, but it might be worth it to you.
687955
This device allows you to have three SATA drives in two bay slots. It seems to be well made and has a cooling fan on the back where the cables connect to the unit. It was little tight going to my Dell system but it did fit. It comes with three SATA cables and screws for holding the drives in place. The nice thing this unit has is power connections, you two of the old molex style and two of the sata style. The trays come out as you would expect. The only thing I don't like is the locking device for the trays. The trays will unlock very easily if you do not twist the little locking device. You have to hold the door closed while you lock it or it will try and pop open. There are lights on the drives so you can see activity. It also has an alarm on it if it over heats. This device is pretty simple and you could figure it out if you lost the instruction sheet.
669212
Great except for mounting the second hard drive. I was a little uncomfortable mounting a 2.5" directly on the case itself. No issues yet, but I wish they had made the second hard drive bay more accessible and provided some shielding or a mount kit.
4827212
I was pretty happy so bought four of these in different colors (so I know the purple & red are my terabyte drives, gold is my Macbook Pro backup, etc).  The enclosure seems pretty bulletproof.  The only quirk is the instructions seem to show the drive being put n upside down from the reality.  Also the "pull tab" to open/close the drive needs to be pulled back upon closing to ensure a snug fit -- it seems designed that it would just click back in place, but on all four of my enclosures I had to pull it back, hold it there, then close it and hope the mechanism would lock.  I don't have USB3 on my Macbook but in Windows I am getting good transfer speeds of about 100MB/s on large files, so it's noticeably faster and connecting as USB 3.0.  Another benefit is if you keep it in your front pocket of your coat or T-shirt it would probably stop a bullet.....
4822020
I really like this drive, it can get into tight spots and has a lot of power.
905994
I recently dug this drive enclosure up when I retired by Home Server. I connected it to my router to use as file storage and a DLNA player for music and pictures.  it doesn't have too many frills, but it is solid and I don't have to think about it too much.
964899
I currently carry 3 drives in mine.  It is a wonderful little tool that keeps all your information you may need very handy.
777241
Did not work for two drives plugged in at the same time. I can insert either by itself and they work fine. Insert both, and I hear a clicking sound and neither ever shows up on Mac OS X 10.10.
4608008
I like the idea of not having to get another mount if and when I do upgrade. Simple and multi-functional like most good ideas.
486882
I have used a similar drive for 2 years and it worked so well, I bought another!
1927555
This is a GREAT PRODUCT 'cause you can put 2 SSD's in the space for only 1 3.5 In. Drive.
4211378
This product is some what difficult to configure.  However, after a few different attempts I have it working with one drive.  I wish that I could use a USB 3.0 WEB HUB and install 3 disc drives.  Is that possible?
842894
This is a nice idea, too bad it would not fit in my case. I kept it because my next computer will be able to use these, and since I clone my drive weekly this is an excellent addition.