About the only issue I have with this scope is the eye relief is pretty low. I think they could have done a better job in that aspect of the design. I bought this to mount on my Sig 522 .22LR and it works great. Easy target acquisition. The illuminated donut works very well in low-light situations. In hindsight, I'd probably go with a 4x9 scope instead of this one with 1x4 just because it is a little difficult to do any kind of 'precision' shooting past 50 yards or so even at the max 4x setting. Zero'd with ease and has held it's zero after numerous trips to the range.
Pros: illuminated donut reticle, construction
Cons: eye relief
This review was written in the old system and had content requirements that are different than reviews written today.