Things I liked:it is very reliable, extremely accurate (if you take it out of the box and use .20gram bb's, don't expect anything special. you have to take the time to sight in the scope with heavier bb's, and adjust the hop-up), massively powerful, fairly rugged, and very affordable. Things I would have changed:well, the hex screw that holds the back of the bolt comes slightly loose, but only after many shots, and there is a hex wrench in the box to tighten it after playing. overall it's not an issue. the hop up does not always stay adjusted, but again it's not a big deal. i just made a notch on the stock in the place where i had adjusted the hop up tab, so i can easily reset it. other than that, I can't think of anything. What others should know:be very careful-if you try and fail to cock it, (pull the bolt not all the way back and then let it forward again) when you really cock it, another bb will be loaded into the chamber and can damage the hop up. if you do fail to cock it, just remove the mag, and cock it. now the mag can be re-inserted without harm. uh, the sling is junk, but I don't hold it against the gun, as it was free. i just got a surplus one at my local army-navy store.