Things I liked:This gun is rugged and very realistic. The hop up is easy to adjust once you find it, just pull the eject slide back on the right side. It is a little noiser than some AEGs, but I think that adds to the realism. The battery is very easily accessible by releasing one button on the top back of the gun. I upgraded to a 9.6v battery from the standard 8.4v. It took about 10 seconds. Things I would have changed:The magazine release lever is right next to the trigger guard and it is too easy to accidentally release the magazine while carrying the gun. That was quickly fixed by using a plastic wire tie that I now have permanently on the trigger guard. Now I just slide it over the magazine release lever to hold it in place and slide the wire tie off to release the magacine. The loop that holds the optional sling onto the gun is not rugged enough and came off during play. That was easily fixed by replacing it with a key ring that I epoxied together so it wouldn't come apart. Now the gun is perfect and I love using it. What others should know:I find that the sighting pulls slightly to the left. This seems to be indicitive of this model, but is totally not an issue in tactical combat situations where you shoot from the hip anyway.