Number of ports
Design and form factor
I got one of these at my old job mostly because my desktop was actually on the floor and I got sick of having to bend down and search for a port when I wanted to plug in something simple like a flash drive. This unit was good because I could put it almost anywhere on my desk, run the power cord and connection to the desktop down the back of the desk, and then have multiple devices attached to it, including a Wacom tablet, a scanner, and a card reader. It was pretty attractive to the eye as well, especially the silver one, which became almost inconspicuous on my grey desk. I think I regret not taking this with me when I left the job!