I have been using a hot water system that I was taught to make myself since I was 16 while diving in water from 34-60 degrees. I tried a drysuit one year and had a seal around my neck tear at 50 feet and nearly drown trying to get back to the surface with a suit full of 35 degree water. Needless to say hypothermia took its toll on that situation. Has anyone else ever used one of these and found it to be more comfortable than a dry suit like I have? I have redesigned mine and used more "state of the art rigging" to provide better working of the temperature control. Opinions, experiences, etc...