I wore a sleeveless wetsuit at the Rumpus in Bumpass last year and felt fine in the 66-degree water. Looking at race reports from '09, it looks like the water was a bit cooler, around 62 degrees. As the race approaches, I'll be watching the temperatures and will have to decide between my sleeveless or renting a full suit. Any advice on the lowest water temperature in which a sleeveless would still be tolerable?

I am interested in trying out a sleeveless wetsuit.
What do you like and hate about it?
Is the buoyancy difference problematic?

I really like my sleeveless, but I have nothing to compare it to because I've never worn a full suit. I do notice significant bouyancy wearing the sleeveless compared to not wearing one at all. As far as water temperature, it ended up being 61 degrees at my race a couple weeks ago, and the sleeveless was fine.