I have had one of these for almost two years, I use it for 4 different OS systems IE, XP, Vista, windows 7 and linux, so can just plug in the OS I want to use. I have just brought another one for data storage. problem is with drives in the computer is they are running all the time, with this you only put the drive in that you want to use, so extending the life of your drives, which is a good thing. not so sure about hot swapping though, I always power down, I play safe. TIP,I have also found that video cassette cases are good for storing your spare drives in.