The Rocket Cock is good if you are just starting out and don't want to clean your tippy (not like you need to that much anyway). It is good for those shots that actually hit the opening to the bolt. Also, It really can't fall off because it's screwed in nice and tight.
-Plastic but I called up and they sent me a metal one, not to shabby.
-It keeps cocking itself when I fire, even when I got the metal cocker.
-I don't like the look of it with the paintjob I have, but I can easily just paint it.
This product is ok if you like to "supe" up your gun and have enough money to. I personally wouldn't buy it if I knew it was not the best thing to buy. You can get it for 15 bucks so if you want to try it, why not.