I bought a Halcyon SS backplate and Pioneer 27 wing last May and have done about 40 dives with it. It works great and everything that folks here on SB said about the stream lining and horizontal control is very true, at least in my case. Unfortunately the rumors of the "leaky" Pioneer have proved true also. Maybe I'm just unlucky but I've never had a bcd leak before. There are two teeny, tiny holes that I noticed while submerging and washing it. They are so tiny that you couldn't make holes that size with a sewing needle. And, it doesn't affect the way it works since the leaks are so tiny...but as someone said, the "H" is expensive and I expected flawless quality. I would still buy another one though. Perhaps an Eclipse this time. Hank