This is good for those who are setting up multiple machines without having to power then all at once but instead clone one drive and mirror instead on the four drives in this docking station and great for professional use vs one drive at a time.
I personally would have no use for this at home, but these are EXTREMELY handy for me at work. Employees find clever ways to completely tank their work computers with malware/virus/adware/whatever and they turn to me to fix their problems. I take their drive, slap it into one of these, and grab the files they still need before I completely wipe the drive.
With this I could do four at one time... now I just need my boss to approve the purchase so I can get one.