Needed to get something like this - I do have cables to connect internal drives to USB port, but this just makes it so much more tidier than hanging expensive drives down from the usb port on your PC!
Obviously the bigger the drive & the more data you are transferring over USB, the more time it takes to copy files over, but thats a limitation of USB 2.0 - not of this docking station.
Can thoroughly recommend - it really is as simple of turning it on, inserting your drive & appears in "My Computer" as a drive letter. the "Apple" design also helps, making it look good as an permanent additon to your workstation or desk!
If you have any reasons or need to copy data off internal drives on a regular basis, I would recommend you buy this - every PC technician should have one!