I'm really not trying to pick a fight or anything here, but what is the basis for the comparison here between the "conventional" BC and the BP/wings? With my BC, I have never noticed all the disadvantages of the conventional BC that people mention. In my early diving with rental gear, the BC may not have fit well and been comfortable, but my Scubapro stab jacket does not give me those problems. It has stainless steel D-rings and a stainless steel buckle. It has pockets and integrated weights, but they aren't failing left and right. I have seen a lot of really old Scubapro BCs around the dive shop and on dive boats that are holding up really well. My stab jacket has a cummerbund (plus a waist strap), but there has never been a question about getting it to fit or be tight enough. It's a depth-compensating cummerbund, so the elastic in the back keeps it nicely adjusted. It's very close to neutrally buoyant, maybe just a little positive, and I certainly don't carry a lot of weight in the ditchable pockets or the trim pockets. Trim is really a breeze and the integrated weights and trim pockets put the weight in comfortable places, like your torso, where you are telling us we are most buoyant. Hovering, staying horizontal, and other skills people say are so much easier in a BP/wings are very easy. I have never seen a tank shift in a properly-adjusted Scubapro BC, which has the best tank strap in the industry. I have never had a problem with air getting trapped in the air cell. Because it is a continuous cell (not just underneath the arms) and has good dump valves, it is always easy to dump air. By the way, there was a thread just the other day about air getting trapped in a BP/wings, and it sounded from the discussion like it is not unusual (I wouldn't know, myself). A stab jacket tends to float you vertically at the surface, and it doesn't ride up around my ears. As all the instructors at our shop know, BC up around the ears on the surface means it is too big. In a properly-fitting stab jacket, the idea of a crotch strap is bizarre, even scary, because you don't need one to keep it in place. I would rather keep that area clear of possible entanglements, myself. Here's the part the BP/wings devotees probably won't want to admit: Scubapro stab jackets (at least my Classic Plus, I haven't checked on all the models available) and the Scubapro Knighthawk CAN BE USED WITH DOUBLES! I haven't done it, but know those who have. So what are you comparing to, the cheap rental BCs you often find at resorts? Have you switched from a well-made, well-designed, properly fitted stab jacket or back-inflate BC to a BP/wings, or from something else? I guess I just haven't seen this crappy jacket-style BC all the BP/wings fans seems to have tried and hated.