I've got that suit and its fantastic. I wear it all your round with no problems. Its one of the best frank thomas has don IMHO.
Its actually fully waterproof, only slight area that get a bits soaked is the cuffs. But as long as your wearing good gloves your be fine. I also don't remember being cold last year, its a seriously warm suit. Althought that is partly due to my £24 thermal set from Kathmandu.