Most of the problems I have encountered with the SR1 is a free flowing 2nd stage that can not be stopped without turning the tank valve off. At first these were happening in deep cold water so we thought it might be freeze-flowing, but when I saw it happen in an indoor pool in 4 ft with a properly tuned reg I figured cold and deep didn't matter. I could be wrong but I suspect that the free-floating orifice in the second stage could be the problem. Anyway, I think D.A. summed it up pretty well, the SR1 is unreliable and I would not own one or recomend one either.I believe the problem with the reg is proper lube of the 1st stage when it's put together. It is very touchy to this. I don't believe this to be a safety issue because the blow ups are happening when the tank is turned on and the 1st stage still functions there is just no seals on it to keep stuff out of it. That being said both times it happened to me I didn't dive with the reg and I wouldn't after it blew out. Sherwood worked with me on resolving the problem with my set but I wouldn't recommend an SR1 to someone at this point.