A guy throws on his sweat pants in the morning when his wife asks him to run to the convenience store for some coffee. He walks into his closet and looks at the Shield that he just bought with the cash he got from selling his CM9, and he thinks to himself, "where the hell am I going to stuff that thing in these pants?", so he rationalizes that it won't happen this time.
What's the probability of the Shield firing and shooting the BG at the store when it is in his closet? Most numbers people could easily come to the conclusion that a gun is not needed, because the probability of needing it is extremely low. In my case, the probability of trying to stuff a Shield somewhere on my body is pretty low. As a matter of fact, as a probability guy, I am more likely to take the M&P9c with at least 12 rounds in it.
The Shield doesn't fit. In the video posted by another member, it is thinner than a 9c, but higher and only slightly shorter. It also loses to the CM9, because mine are 100% reliable...same as my 9c. The Shield was a mistake for S&W and those that purchased it. I won't even buy one in October when they are $300.
Check out the M&P forums. The complaints are starting. The trigger isn't what they said it would be so people are changing them out already. There are accuracty questions. The mags are not dropping free of the grip. Even the biggest fanboys and most outspoken, have cooled down a bit on the gun. One even said that the 8rd mag doesn't need to drop free, because it will be the backup or second mag you use. Huh?
If you like 9mm, own a CM9 for the trip to the store and 90% of your carry situations, and get a M&P9c for the other 10%.