Never even used the stock cocker, just bought the rocket cock to begin w/
Tippmann 98 custom, rocket cock, 12" Smart Parts Teardrop barrel, 20oz Pmi CO2, soon to have polished internals.
Keeps crap out of the action, I've actually had paintballs hit my rocket cock, pulled out the slide seen paint all over it and not found a drop inside the action. Definitely does what it's supposed to do and well at that.
Plastic, but if you don't hit it against anything that doesn't matter, I'm lookin' at tryin' to make a metal or wire cocking slide, to replace the plastic one. the slide comes loose every now and then but in a fire fight you tend not to notice things that trivial.
Relatively inexpensive, does what it's meant to do, durable if treated well, all in all an excellent product. 8 for plastic and slide probs and cuz nuthin's perfect.