It is good except for one thing.  Call me back when I do not have to use up a filling to get refilled.   Nearest refill station is in Truckee, CA.   There is also something that worries me about widespread hydrogen use.  Can anybody say 'Hidenburg'?  Probably not a problem, but there is that thought back there because of how easily hydrogen combines with oxygen.  You may not even see the spark that sets it off.