Skied today in 47F water 63F air, and the suit performed exceptionally well. Very nearly a dry suit, if it weren't for a small amount of water that seeps in through the zipper, it would be a dry suit. The snug fit is great and extremely flexible to the point you'll forget you're wearing a suit at all. The surface has the silver coating which works like waterproof slick skin, so wind chill was not an issue
If the air and water temps equal 100, this suit will replace my dry suit.
BTW - I paired it with the Neoprene Beanie Laurie Liddell sells, which works extremely well for retaining body heat and kept my head warm and dry. Great Combo.