My M40 has been very reliable with every ammo except S+B, which would not chamber fully. Mine has the most accuracy and least recoil of any .40 I have shot (Cougar, USPc, P99, Small Glock) I just ordered a mag from CDNN with no problem, and I have no idea what kind of parts it will ever need, it is a high quality weapon. The takedown is very quick and easy, but I have never striped a glock, but can't imagine it being any easier. If you want the M40 not a S40 you can get them very cheap from CDNN, I think $369. Mine was an early model and had the trigger upgrade performed a couple months ago and it is even better than before, which was good. Now I would say I like it better than a glock trigger for sure. good luck