Things I liked:Everything,this scope incredible The half milldot spacing is a must for airgunners or anyone else that wants pinpoint accuracy The 10X reticle really works at 10 power setting. It makes the milldots exactly 3.6 inches apart at 100 yards making range finding very easy. Things I would have changed:Make the sunshade 1 inch shorter, and thread it so the lens cap will fit. What others should know:Scope is very long, a little over 18 inches with sunshade attached. May cause mounting problems on some rifles Mine is mounted on a Benjamin Trail NP XL. Getting the proper eye relief without having it go past where the barrel breaks open was sort of tricky.But it can be done. The use of narrow scope mounts can be very helpful. Because of design, the larger 42 mm. objective diameter is actually smaller than the original 40 mm. objective, so it mounts very close to the barrel.I used a medium height ring and it works very well.