I just purchased a used M&P 40c equipped with the CT laser grips. They work very well, and I'm well pleased. I don't think my M&P was shot very much, if at all by the previous owner(s), and the sights and laser shot to POA right out of the box. My M&P does not have the safety, so I cannot speak to that, but I like the accessibility of the on/off switch, and the slimness of the unit itself.

Best of luck,

Dave