I do not have a M+P but I have returned my 640 and my CS9 for warranty work.I must say the S+W warrantee is fantastic.You call their #,they send you a pre paid return ticket,they fix the problem,and send it back to you.My 640 was a well shot gun where the barrel blew off and the frame cracked using factory 38 cal loads.They had armorer inspect the gun,they destroyed it , sent me a factory letter attesting to its demise,and sent me a new 640 in the span of a few weeks.My CS9 had a broken trigger relief spring,they sent a pre paid return label,I had them also do a trigger job and conversion to DAO @ the same time,paid for that work,and in 15 days it was back to me with the work completed.The M+P is a excellent pistol.Buy it,shoot it and enjoy it.....God Bless......Mike