Similar to Dallas Denny, I too would pay to replace mine in a heartbeat! I am about to order a second for a portable tank. I've only used it once so far, but let me tell you.... It is SO much better than a standard non-rebreather mask!!! I was hesitant at first too because I just bought an expensive O2 tank, regulators, etc and didn't want another cost but it is so worth it in my opinion.