I purchased this product for my Kahr PM9 mostly because it was advertised as easy to install and use. When it arrived I was very pleased at the ease of installation. Fit was perfect and it really was simple to install, I had it on the gun in a matter of minutes and ready to sight.
I use a bore sight laser and after inserting it into the barrel of my PM9 I turned it on then activated the Crimson Trace by simply holding the gun and applying a small amount of pressure to the grip area as advertised. At 21 feet the bore sight laser and the Crimson Trace Laser were about 4 inches apart (just high and left) I adjusted the elevation set screw and the windage set screw with a couple of turns and the lasers were on top of one another.
I took the gun to the range the next day and dispensed over a hundred rounds, I couldn't believe how accurate this setup was. I went to Conceal and Carry class the following weekend and qualified with this gun using the Crimson Trace, it was absolutely great in low light situations which I was told are the majority of real life shooting situations.
One of the things I like most about this product is the ease of use, there is no on/off switch on this device, when you grip the gun the laser comes on and you are ready to go.
Easy to install, easy to use and accurate, that's a trifecta in my book, I highly recomend it.
Pros: Easy to install, easy to adjust, works every time, very accurate
Cons: A little spendy but you get what you pay for
This review was written in the old system and had content requirements that are different than reviews written today.