First time to use this. It is very easy to get "on the paper" You still have to shoot your gun to sight in but when that is achieved you can note the settings for further use. Only negative is that it is difficult to replicate exactly plumb and square and distance from center of bore to center of sight. But.....it does as it says it will and that is to boresight and get you on target easily. Saves time and money!
Pros: Easy to use
Cons: none
This review was written in the old system and had content requirements that are different than reviews written today.