Like many other 709 Slim owners, I have had trouble with the shots going low and to the left. This has cured the problem, and is an excellent purchase, notwithstanding CT's pricing of the product. BTW, Optics Planet shipped it quickly, and was very responsive to one of my concerns.
Pros: Easy installation, easy to use
This review was written in the old system and had content requirements that are different than reviews written today.