That is more or less what my crew sail with, in the north sea. Just as waterproof as my 4 year old HellyHansen "drysuit", keeps him dry and gives him the opportunity to regulate his clothing to the conditions. He has not taken a bath with the suit yet, but it should be no big issue as we are rarely far from land. His jacket is the kayak style, with a hood, which he really like in heavy rain.

I hope santa comes with a pair of trousers like that for christmas. Would go well with my kayak jacket..