Pros: If you want to experience live action first person video without buying an expensive helmet cam, these will do the job. If friends or relatives are envying them, they are cheap enough that you can just give them away and order another pair. The free shipping is surprisingly fast.

Cons: 640x480 has it's limitations. Low light performance could be better.

Overall Review: Remember to order a micro SD chip (up to 16GB) so you can begin using them as soon as they have charged.

Pros: Holds four 3TB drives. Drives install very easily with no tools. Sets up quickly and easily in various modes when properly powered (see below) with little skill required. Tech support is friendly, easily accessible, and helpful. Functions well with a Western Digital Live media player to make a gigantic portable HD video library. Very quiet and cool.

Cons: There is no internal support for SATA3, SATA2 only. This ought not to matter for transferring data via USB 3, but rebuilding a 3TB drive, which relies in internal data movement, may take close to 12 hours. I went out during the process. I don't even know the exact time required. There is no support for 4TB drives, the maximum is 3TB. There is no support for capacity expansion. If you are running RAID5, which is striping with distributed parity, and you want to add a 4th drive to increase the capacity, you have to save the data elsewhere, install the drive, then reformat the whole thing and restore the data, which takes a long time for 12TB of data. The included software is of little or no use when the blue lights turn red and the data has become scrambled.

Overall Review: This unit ships with a 1.5 amp wall wart power supply. This PS is not up to the task of powering three or four 1.5 amp drives, not to mention the actual unit. The blinking on and off of the machine that resulted caused the RAID 5 configuration to be scrambled, requiring reformatting the machine. I don't know how it worked long enough to put the data on there. Fortunately, this was not a problem; I had copies elsewhere The company is sending me another (1.5 amp) power supply, which they claim will work under these conditions. I suppose it would if you only ran the unit with one drive installed. In the mean time, I just went and bought a 10 amp power supply elsewhere. I will probably give up on RAID 5 and switch to JBOD (Just a Bunch Of Drives) which will give me 12 TB (rather than 9 TB) under one drive letter and only use one scarce USB 3 port, as hard drives rarely fail and the RAID 5 configuration has become scrambled twice in a few weeks and appears to be sensitive to power fluctuations. This reduces the usefulness of the unit somewhat.

Pros: Fast, easy setup.

Cons: Wish I'd bought a few more when they were on sale.

Overall Review: Very small. Don't lose it in the carpet.

Pros: Works fine, arrived promptly.

Cons: None.

Overall Review: Bought four of these.

Pros: Facilitates using small and compact Micro SD chips as USB flash drives. Micro SD chips can then be used in all my cameras and players, sometimes with an SD adapter. These Micro SD to USB adapters will fit in the USB ports on essentially ANY computer without blocking other ports, something most USB flash drives will not do. Help protect the Micro SD chips from damage. You can attach a large tag to the adapter and park the chip in it so you don't have to figure out how to write on the tiny chips. This also helps protect the tiny chips from loss or damage.

Cons: Don't step on it on a hard floor. Don't suck it up with the vacuum cleaner. Order a few extras so you don't have to change the chips too often. USB 3 coming?

Overall Review: Bought a few of these. Work great. Buying more.