Things I liked:the speed of fire, selector switch Things I would have changed:the worst thing about this is the batteries!! if you forget to open up the battery compartment, DEAD BATTERIES!!!! it eats batteries like there is no tomorrow! the feed system works..... it is sometimes hard to fill the feeding "magazine". shake shake shake, turn it sideways, up n down, finally fills up and the click all gone.....lol What others should know:all in all, i do love the gun but there are some issues with it. you NEED to upgrade the air system though, the 88 gram cylinders do not last long at all! i bought a 20 ounce paint ball cylinder and a refill station, now its great except the battery issue!