Summary: Ideal for backup of files and folders like videos and photos, or other purpose. The fact that it is a stack of four HDD device, one might keep in mind that working from one HDD to an other one in the stack is not a good idea. Using the same USB connection will make a very slow copy/transfer rate job... and more heat in consequence on the two HDD in work for exemple. This will put in danger HDD's and the Vantec device.
Summary: The enclosure disconnected only once when transferring files but has operated flawlessly since. I have three 3tb drives and an 80gb drive installed. All drives stay at 36 C even under load so all in all a good enclosure.
Summary: The unit worked without any issues. No setup required. I have it running on an iMac. I am enjoying the faster speeds of USB 3.0 although no where near the 5 gig/sec possibility. Currently have 2 3 terabyte drives in the unit. The unit is quite light due to being made with a fair bit of plastic. My only complaint is that the fan is louder than I would want it to be.
Summary: I purchased mine 2 months ago and have 8TB installed running USB 3.0. I transferred just over 2TB of movies, music videos and music in just over 6 hrs. Now this transfer was from a Seagate Go Flex drive to the Vantec HX4. The old drive before this was 22.5 hrs. with only 1.6TB of files with USB 2.0. Now these HDD are WD Caviar Green 2TB @ 5400 rpm now if they were 7200 rpm the transfer would improve even more. Great purchase. Highly recommended.