Things I liked:I bought this scope because it was full metal and would add some weight to my Powerline 5170... It has done that and more! Some people would say that if you move you head the red dot stays on the target. It does not move if you move your head. I love the 5 brightness settings and the red/green dot reticule. Things I would have changed:The dot is not as crisp as I'd like it... However my shooting eye is not perfect. To my right eye the dot gets crisper but still my right eye isn't the best either. What others should know:The threads for the battery compartment, windage, and elevation are extremely thin. You MUST be careful while taking the covers for them on and off or you'll strop the thread.