Pros: Small, quick charge, long lasting.

Cons: None

Overall Review: Got 4 for a JVC GZ-MG77 Digital Camcorder, 30gb hard drive. I can film all day.

Pros: Great idea, great tool.

Cons: Something inside the cradle that the hard drive sits in broke at the point where the esata cable plugs in. I can shake the cradle and hear the part rattle around in there. The esata cable itself is okay, the hard drive is okay and still readable through the included, additional usb cable connection. But I can no longer use the esata connection. The usb connection is too slow for my purposes.

Overall Review: It broke 6 days after the 30 day NewEgg warranty and so far I only get voice mail at the manufacturer during proper business hours. NOT a good indication of good business practices.

Pros: colors another usb device that may decide to work some day.

Cons: windows xp says "found new hardware" then "ready to use" but not really there. win 7 says nothing, recognized in disk mgt, won't format, neither website listed on product page has any working kink to product.

Pros: NONE

Cons: I have others to compare this one to. This one has the writing (and deleting) speed of a hammer and chisel on stone.

Overall Review: How else can I say "JUNK," how about "GARBAGE?"

Pros: Works fine.

Cons: Wasn't easy.

Overall Review: Bought 12/2011. Gave a 1 Egg review in 03/2012 because all sata hard drives had to be disconnected (msata for system drive) on any restart for the IO-PESA230 to work and their support was useless. Started working with a win7 update. Works fine since then, ordering another today.

Pros: Worked for a while

Cons: Quit working

Overall Review: Don't buy it