Hey, it was the best controller around when its competition was uncomfortable bricks or flimsy little toys like the Dreamcast and N64 controllers, but we've come a long way since then. The design is outdated. Granted, the Xbox c360 controller IS a bit big for some folks, and I'd really love to see them make a smaller version for people with smaller hands, but it's still a more comfortable design.
Then there's the original Xbox Fatpad... I won't even try to defend that atrocity xD