I've never mounted a scope before and with this set up it went on in ten minutes. Went to the range then next day to sight everything in and was done in about 12 shots. I used this on a howa 1500 sa in .308 with a nikon prostaff 4x12x40 scope and I am completely satisfied.
Pros: Everything you need in on product.
Cons: Non that I can see.
This review was written in the old system and had content requirements that are different than reviews written today.