This is a great product and I've been extremely happy with it. Using it at the range seems like cheating sometimes. My only problem with it is that the unit doesn't completely fit over the trigger guard of my PX4 Storm. But, that is mostly because the trigger guard is a bit beefy. I plan on putting this on a P226 in the future.
Pros: Very easy set up and zeroing.
Cons: Doesn't fit over the trigger guard of my Beretta.
This review was written in the old system and had content requirements that are different than reviews written today.