I have owned the 40C and Shield in both 9mm and 40. They are all great guns but i"n my opinion none of them are pocket guns. The 40C is a sweet shooter and I am wanting another one cause you can switch out the barrel to a 357 SIG which I think is a fantastic self defense round. I carried the 40C on my right hip and it concealed ok. Certainly not as easy as the shield. The shield was a little snappy but very controllable. Ultimately I decided to move to Kahr (CW380, CM9, CM45) as they are very concealable and have fantastic trigger and shoot very nicely.
Don't get me wrong S&W makes great guns and I am waiting in anticipation for a Shield 45.
Dan