First time I wore the Exel suit, I came home in it (fortunately it was a short drive) and got my wife to get me out of it!
Limiting factor for us windsurfers is when the air is below freezing, you get ice formation on the sail and boom (learned the hard way a few years back, could not remove the frozen mast from the sail, drove home with the whole sail rigged up in the van sticking out the window).
The suit is no longer the limiting factor for cold water sailing :-)
It's more fun snowboarding in those conditions!