I’ve got a SBEII. It just works, all the time. The only problem I’ve had with it is cycling with really low brass crappy shells - Herters target load. They jam in the ejection port. They just don’t have enough charge for the inertial system. Every reputable brand of target load works just fine. They’ve handled salt water, getting dropped, stepped on, etc. I’ve seen two (mine and a friend’s) get ejected from an ATV gun rack and get run over by the quad. We picked them up, cycled them, fired them to check the function and zero, and went right back to hunting. They really are a tough piece of gear.