Though this isn't one of them, let me start by saying that I really, REALLY LOVE Arena's Asian-made suits! They are by far the highest quality swimsuits in the world! (The rear mesh seam on Asian suits makes it stand out alone.) Why aren't the Asian-made Arena suits available Stateside?
As for the Satamis brief, this suit fits true-to-size and is very durable, as other reviewers have mentioned. My only real complaint is that the drawstrings are way too short and retract into the waistband. Also, since the drawstring is sewn into the waistband in the rear of the suit, you can't really replace it easily with a longer chord. Fix this problem and you're already half-way to a 4-star rating.
Use higher-density fabric on a briefer cut... along with a rear mesh seam (to reduce drag) and you'd have the perfect suit!
Finally, I'm not sure why a size 32 is reserved as a Youth size. I'm well into my thirties and have been wearing a size 30 or 32 suit my whole life. Frankly, I see no need to offer different suits for adult versus youth. Size is size. Who cares who wears it?