I bought this for my most recent half-ironman.
The good :: I am 170 lbs, 6" tall and a medium fit very well (TIGHT!). The fabric is extremely comfortable and dried within 15 minutes after the swim. The sleeve and pant hem were comfortable and did not ride up, move, etc. Rear pockets were easy to access on the bike and the center front zip was a lifesaver on the run (Vineman gets hot). The chamois was unnoticeable on the ride and run (read, no chaffing). The suit feels fast!!!
BAD :: It is not easy to get on and off. The sleeves make it more difficult then most one-piece suits I have raced in. So, if you consistently have to use the restroom in a race, this is probably not the suit for you.