I am very pleased with the crimson trace for my PF9. The laser installed very easily and is securely in place. The beam in bright and can travel farther than you would ever realistically shoot. The only issue I have is that the housing of the laser slightly decreases the space in front of the trigger which may be an issue if you have bigger fingers.
Pros: lightweight, bright, easy install
Cons: slightly decreases space in front of trigger
This review was written in the old system and had content requirements that are different than reviews written today.