I rented the Joe Rocket suit in a size 44 when I took FAST. It felt pretty loose in the sides and it gave me a sick wedgie/hunchback due to the cut/sizing (I believe I've invented the male camel toe lol). But overall it was fine in all other respects. I'm approx 5' 8-9", 190+ lbs with a short inseam around 28" or so.
I now have a AGVSport Willow 1 pc also in a size 44 and it fits great. I think the limbs are a bit long but not really sure what the ideal length is. Personally, I just don't want it bunching up under my gloves/boots so I'll have to find a place to have it hemmed.