I love my xtremes... Never had any problems with them.. Breaths a hell of alot better than my Apeks regs... All my apeks rges have been delegated to backup service (except those on my Rebreather - although soon to be replaced with extrem firsts)..

I only switches to Apeks at the time because of the difficulty with the last poseidon distributir in the us

The Pop sound has always been around on these servo type regs.. if it sppoks youjust hold your hand over the mouthpiece when pressureizing and the "pop" is almost non existent..