Have had my CTL on my PM40 for 3 yrs and have been very happy. In no way does it effect concealability. Wonderful in low light situations, but limited performance in bright sun. Does require holsters which fit it and there are several on market. I have 3 different styles, belt, IWB and pocket. Very reliable. Free batteries for life. Not fragile at all. Very stable and has maintained zero with no adjustments even with daily carry (pocket, IWB and belt). I highly recommend them on at least one carry gun, especially for night SD at home. Well worth the value. Give it a try for yourself and if you are not happy, send it back.