Yes, I have the MM full harness (with the leg wraps) and it's fantastic for distance stuff. It does limit me a bit when continually ducking the boom in bouy situations, which is why I had that windsurfing harness which was a lot smaller.

One other question on that particular harness - what do the sizes (S M L XL) equate to in terms of waist circumference? I think I'm about a (US) 34 men's waist size...