While tap-rack-bang is the proper basic response to a malfunction, it's pretty common to see folks pull the trigger again a time or two after experiencing a failure during a rapid string of fire in Force-on-Force training. Restrike capability could potentially be a lifesaver in certain rare instances, but if you are using high quality 9mm defensive ammunition in a high quality modern firearm, I think a TRB is most likely necessary to correct the cause of the malfunction in the vast majority of cases. I myself would prefer to have restrike capability since I like true DAO handguns, but when I consider all factors and compare the various guns in 9mm, the best choices(IMO) do not have it. I want a proven and reliable weapon so that neither TRB nor restrike capability is likely to ever have to be utilized. For me, if I was looking for a small single-stack 9mm to carry IWB, I would be looking real hard at a Glock 43 or maybe even a Shield.