I only tried it for a couple of weeks. But I set mine to a 50% rebound. What was interesting is if I pumped it up it would suck back in as mush as it pushed out. You will have a little better chance at eliminating chassis slap from over shooting the jumps to. Its a great tuning option. I would recommend trying it on a practice day. You will want to try some oil combos and spring combos. The reason I tried it was it allows you to run the aluminum caps cause your bleeder caps wont be an option. I personally liked it when the track was dry. Or track is wet, so it was just to responsive.
Note it may have been my error but a cap blew off on me once. 100% was way to much I think.

Here's a bleeder cap tip that I do. Before I plunge the shaft to pump the air out, I put the spring cup on then pump the air out. The shock shaft will never push further than that anyway.