Things I liked:Stabile - once tightened things stay. Uses standard battery. Things I would have changed:Put markings on it to explain windage and elevation -- guess I can do that myself. Need more adjustment range (elevation). What others should know:There is a post at the bottom of the lense and a white notch at the other end, just like open sights on a rifle. Use these same way and the red dot will be consistent, otherwise, the dot will float around between shots with different impact points. The dot isn't exactly round, but it is a serviceable dot for plinking and maybe short range hunting. But it is bright enough for daylight.
Put it on a shooting table, line it up with the target, keep it there while turning the windage and elevation screws to learn which way they go -- keep notes.
Tighten the battery cover well or while you turn the dot on/off the cover will turn instead.
As it is, this sight would not work for my gun due to a raised picatinny rail -- if the sight could be mounted lower, the dot would show in the center.
Things I liked:Looks very closely authentic. Works like a lever-action is supposed to. Load capacity twice before gas is gone. It beats the price of the Walther lever-action .177. Things I would have changed:Fill the plastic stock parts to make them a bit heavier -- gun is a little light. Make the barrel bands more secure to hold the magazine tube and barrel tighter, so they don't twist. Make it so the front sight is higher so that elevation on the rear sight can be used. What others should know:Shoots the BBs very fast. Tried the .20's and .40's but the hop up makes it shoot very flat -- too flat! Hop up adjustment didn't seem to affect anything. I can't bring the rear sight down any further but it still shoots high at any range. I am using propane w/silicone lube from bottle with adapter (stinks, so use when the air is moving away from you). BTW, can't use it on the Crosman Airsoft Target Board (the sticky targets) because it is too powerful -- the BB's bounce off after punching a hole in the goo. It beats the price of the Walther lever-action .177.