I just bought this gun off of a friend and it is awesome, there is just no arguing about it. The rps selector doesn't really work but who need it right? my only gripe is how heavy it is, and where the weight it. its all right in the middle of the gun, which is nice for balance but it makes it really hard to shoulder and move quickly. Again you shouldn't really need to move that fast, i would recommend tacking a knee and bracing your arm on your leg. that seemed to work well for me.
-decent rate of fire
-fps with .25 bb
-quick change spring
-fairly sturdy bipod
-randomly the gun will continue firing after you let the trigger up, just give it another quick pull and it should stop.
-really heavy, mine came it around 18 lbs unloaded. i suggest getting a sling.
-the stock is a little small for me
-battery space, do your research before buying a battery