I know others are making much more power, but I'm happy with my car. Doing mostly city driving and not tracking my car, I find that Stg 2 is personally enough for me. I'll be honest though, I do envy those getting 400whp.
That said, I do enjoy the piece of mind having a full warranty. I'm coming from an M-Tech 540i, which was very expensive to fix when something went wrong. Do I regret getting Dinan? No, but I'll fully admit that if I didn't have it, I'd be going with Procede or JB3. I have to admit though, I would be worried about anything happening to my car and being denied warranty work.