I have no experience with it what so ever. Some say snake oil, some say they'll never go with out it. I really don't know nor have I checked in to it that much. I'm more concerned with pulling the trigger. I'll get a new barrel when need be and load my rounds a little hotter if I want 100 more fps.
There is an abundance of threads on this very topic. Check out the links above.
*Oh. The search engine on the right below the shout box and sponsor square works great. Just type what your looking for, and nine times out of ten there is a topic on it.
I hope this helps you out, and welcome to the hide