Things I liked: Does what it claims to do.
Things I would have changed: Put some kind of valve. realizing it will cost more.
What others should know: With a 20 oz tank it becomes a really long stock. My 5'8" tall brother puts the tank on his shoulder.
Things I liked: Great solid gun.
Things I would have changed: Seems fine.
What others should know: My smaller brother has a tough time getting groups with it ,and ate the scope once. I'm 225# and have no trouble getting good offhand groups with it.