My 3550 plus the Pro 5.0 equals one seriously stift, rock hard shifting trany. It definitely takes some getting used to. You have to PUT it in gear...none of that slip it in crap you have with a T5. It's one of those thing where, if it were my daily driver it would annoy me, but because i'm just having fun it sort of adds to the whole experience. You know you're not in a commuter when you drive it