Things I liked: I have gotten excellent accuracy out of this rifle at 10M. I had the best luck with heavy domed pellets (Crosman Premier). I think domed pellets feed better and are more accurate than wadcutters in my gun. You may find differently. This gun is decently accurate with the stock rear sight, but the diopter sight with the sight inserts is really a huge improvement. Front sight comes pre-modded for the included sight inserts, which you really need with the diopter. Stock is plenty adjustable for small or big shooters (you just have to switch the nut to make it extend more). I would not hunt with this gun due to the low FPS and target sights (OK, maybe chipmunks or starlings but that would be it). Low noise and works great indoors for winter practice.
Things I would have changed: I wish extra mags were cheaper, I would like to have 20 of them.
What others should know: Like others said, use blue loctite on the diopter sight screw, and use a tool to tighten it more than hand tight, or it will slip eventually. Clean the bore thoroughly and also any of the outside metal as it is covered with a preservative oil. Some people have complained about pellets falling out of the mag; this only seems to be an issue with light pellets. I don't really care about FPS as I am shooting for accuracy at 10M, so I'm not concerned with the drop in speed with the heavy pellets. Read the manual well before you run the gun. Speaking of the manual, I like the stamping and signatures by the guys in the Izhevsk factory. Dosvydanya comrade