As a long time Glock owner I was really impressed with how good the M&P felt in my hand at my LGS the other day. Prior to yesterday, I always overlooked the S&W semi auto's due to some bad experiences with a few of the S&W Sigma pistols. I tried the M&P full size in 40 and the Shield in 9mm. I think one will come home with me in the near future and could see a .40 Shield replacing the G27 for carry. I would love to try a compact 45 ACP down the road as well.
For the Glock owners, how does the M&P shoot compared to a Glock?