As a PM who is going to cross the threshold in less than 6 hours (love da gogo) after I finish PHX-JFK-BUF today, I was TOLD that when I became DM I could even WALK ON WATER !!!!! YES !!!!!!
That's really the benefit I'm looking forward to most.
However, since it's going to be Best In Class, I guess the only time it'll work is when I'm Ice Fishing in Jan/Feb and freezing my you know what off.