I've always found that even when they are waterproof the water still creeps in down the sleeves and into the lining, unless you took your boil in the bag suit round them.
Been using these for months now mate. There spot on. Havnt had any leaks, a little damp when it proper poored it down but by far the most waterproof ive used so far. and toasty warm, was riding in sleet and didnt feel to bad.