I can't decide if being to make phone calls with a muse or having a puff counter on any other mod is a more useless feature. No it's the puff counter, my itaste says 0 and I know I have clocked it before but I have never actually looked at it and went I had 64 puffs today, because I really can't see what that tells me. When I smoked I could finish a ... in 4-5 puffs if I really needed one and other times no idea how many I had, with vaping it is a bit more consistent because I don't usually get bad craving but I still have longer draws with tastier juices so juice A might do 20 puffs per ml while juice B get 50.