Things I liked:I bought this gun for my 9 year old and quite honestly did not know the first thing about these guns. The sales rep on the phone was very helpful picking this gun out for my son. The gun is nice and heavy (not too heavy, though) and seems to be very well made. The accuracy, speed and power of this gun is quite impressive. I have shot another airsoft gun (a cheaper, yet similar model) and there is absolutely no comparing the two. The only thing I was not familiar with (but th is is the "hop-up" design) is having to spin the mag hopper wheel every 5-10 rounds to make sure there are BBs in the system. The magazine is nice and large and holds somewhere in the ball park of 100-125 rounds (I am estimating.) Things I would have changed:I really cannot think of much I would do much differently with this gun. The only thing that would be an nice option (as in included) is the ability to have the Picatinny rails added or included so as to easily attach scopes, sights, etc. What others should know:Only having one magazine (of this capacity) does not seem to be an problem. Now, my son and I are not getting into major battles with lots of people, but playing in the yard, neighborhood with friends, etc but it does not seem to be an issue. IF you are going to be taking this gun into major battles with long play times or short intermission times you may want to pick up another magazine. Also, Picatinny rails for a red-dot sight would be another add-on I would consider as well.