I have a lasermax on my LCP and would take it off if my wife did not want it on. (her carry gun) As I learn more I feel that the factory sights or night sights are the best for training and I dont want to rely on a laser. I will say as far as the laser goes it is nice and I like the on off switch of the Lasermax compaired the CT laser that is always on if you are gripping the gun.
I have one on my .40 Shield and it works just fine. I like the activation button and the fact you can turn it on or off as you need it. I am generally a big Crimson Trace fan, but the price of this was too good to pass up. Overall, it's a decent product.