I dive oceanic regs but am also an oceanic tech. Only thing is I have to service the regs at the shop. Have to get the parts thru the shop. Funny thing is that even though they are the same company I can't service Aeris under warranty. If I moved to an Aeris shop I'd have to take the Aeris course. I imagine Hollis will be the same. BTW glad I did not wait the two years it took from the time I heard about this to get started in tech. They missed out on a BIG chunk of my money. 2 BPW set ups, manifold and bands for two sets of doubles, cannister light etc.