own several sigs and no m&p guns. have shot the m&p and like the way they shoot and feel in the hand. if you can afford both, the sig is a better gun,but sometimes the customer service sucks,about like browning. doubt you would ever shoot it enough to be rebuilt unless you are shooting several hundred rounds per week, and even then it will take awhile. my normal carry gun is a p226 and has been for years.