Bought this for my beside Glock 30 for that 3am crude in the eyes can't seem to find my front sight, tactical advantage. It's easy to sight in, just line up with your front sights at 50 feet. It's basically on from there but fine tuning can be done at the range. Excellent product. I have confidence in know that where the laser is my bullet will strike. Highly recommended.
Pros: accuracy when shooting from akward positions, excellent in low light
Cons: none to speak of
This review was written in the old system and had content requirements that are different than reviews written today.