Pros: If you can get it to work, transfer speeds are quick.

Cons: Will not work without an external AC power supply. Overheats quickly.

Overall Review: I've tried the drive on 2 different desktops and 1 laptop with USB 3.0 ports and none had enough power to get the drive to work. Light would come on, but you could hear the drive spinning at variable speeds and popping in and back out of the computer's drive list. Adding an external AC supply to the mix got it to power up reliably, but after about an hour of solid data writes (my intended use is a backup 3TB of data), it crapped out and was no longer recognized by the computer. A few days later, I tried again and the drive was back to working which made me suspicious of temperature issues. This time I loaded some SMART drive monitoring software before trying again. Sure enough, after about 20 minutes, the drive temperature was being reported as 128 Fahrenheit and was still climbing. It's a plastic case (ie a thermal insulator) that just can't get the heat out when under high load. I had transfer speeds up to ~150MBps, so the drive is fast if you can get it to work, but it can't sustain that rate for more than a few hundred GB of data. If the point is to be able to reliably back up 4TB of data, it fails miserably. Very disappointed in this drive.