They've been my "daily boot" for ice climbing for 10+ years. Well built, quite light, about as warm as a boot like that would tend to be (but upgrading the footbed will help minimize heat loss to a crampon - I recommend you do this). Runs true to size, medium width. Totally rigid so I wouldn't want to walk dry ground very far in them. I've never had water get into them, but someone reviewed them online years ago and said they don't breathe well. Sole is semi-curved; they don't pair well with old straight crampons e.g. Charlet Grade 8, but do well with Darts (which I think are representative of most current crampon shapes.