I have the old model LC9 (the one without the glock style trigger safety) and like it more than the new ones. It has a safety which is a must in a pistol that might get carried in a pocket and what I think is its biggest safety measure is the trigger is heavy as **** (about 8 pounds) and long, so you have to be serious about making it go bang. I love shooting glocks and have had a couple over the years but there is no way to safely carry one that is not in a holster that fully covers the trigger. They work great in duty rigs where it is easy to get a proper grip BEFORE removing it from the holster, but in my opinion there are just too many variables in concealed carry to justify the risk of an AD and giving yourself a second butt hole or worse. The NY trigger kit helps (takes the trigger pull from about four pounds to over ten) but it is still easier to AD in a moment of adrenaline.
I am not just ragging on glock, but all of the pistols that use this style trigger. When they first became popular an old and wise friend of mine compared them to a light weight bobbed hammer 1911 with all but the internal drop safety removed and asked me if I would be comfortable carrying one Mexican style (tucked in the belt) cocked with one in the tube. No way was my response, and when you think about it, the glock and it ilk are not much better. Keep them in a military flap style or duty holster on the belt where they were originally designed to go and leave the concealed carry to guns with a long revolver style trigger and a safety.