Just remember that you cannot plug a SATA drive in at the same time as IDE, or replace a drive from one type to another without unplugging the USB. They do hot plug though, and work well, though a copy operation of an entire drive will take a night. Very useful to have though, I have a few around. just take care that the PSU that typically comes with them is about the worst POS around. Might have a 3 pin mains connector, but only uses 2. Cheapest caps inside as well.