Summary: I hoped these could have thunderbolt options. It's just that I have only 4 usb3 on my iMac :)
Pros: I have four of these and I'm really happy with it. I tested their speed and found out it is the fastest external single drives that I ever had. 200 mb/s read and write. Before my fastest drives were up to 140 mb/s and it was also 7200 rpm but not these fast! I use it for 4k video editing on my iM...
Cons: I didn't experience any negatives from these drives
Pros: After my 3rd Western Digital external died, I switched to Toshiba. Never had a problem with their drives, my old Toshiba ATA still works. This is my 2nd 2TB and I also have 1TB, never had a problem.