Lines have to be purged before going into the boot so bottles will deplete - also, purging makes a great noise so helps to pass the time.......
Different degree of servicing and those whom have it in SNS seem happy enough. I suggest any niggles with nose clip being designed to suit maximum shapes will soon be forgotten when under water!
Atleast they have EBS - unlike the crew who will still suffer from 'cold shock' regardless of how big their escape door is ;-)