I recall playing the PS3 version a while back, it had some serious framerate issues!
All I've heard about the PC version is along the same lines.
The game clock in at around 25 GB, if I recall.
Yeah, you'd need a blazing connection, if you were to DL this shiz.
If I'd get Star Wars: The Force Unleashed - Ultimate Sith Edition PC, it'll probably be on retail disc.