My bro got it for the 360, so now I own a cracked PC and a real 360 version 
The interface is pretty clunky on the PC (especially after playing nothing MMO's for the past year and a half), but it seems like it'd work better on the '360. Have you tried the '360 version yet?
Yup. Got to level 16 on both versions.
Movement in the 360 version is a little clunky at first, but after a little bit, I stopped noticing it. The interface is pretty much the same, but moving around the menus and switching out inventory is easier on the 360 due to simple mashing of the "A" button instead of having to click the gun, then click the slot.