Man, you don't have to answer to anyone but yourself... If you want to dive it for no other reason than gee-whiz factor go for it...(get the proper training just like any other piece of gear...)
Since the issue has come up FFM offers the user protection from the cold, allows the use of communications, allows the user to breathe through thier nose, and decreases jaw fatigue.
FFM also offers the diver protection when using high PPO2 (protection from drowning if convulsions...) I believe JJ is known to use one for 100% deco or has in the past if that makes any difference
Looks like a spin off thread has started...
http://www.scubaboard.com/showthread.php?p=507616#post507616
current pricing information is posted over there skier...
Jeff Lane