Get used to it dude. I have about 2,000+ miles on my SPEC stage 3 and it still chatters like a bitch. Shit from the engine bay knocks against my firewall and it sounds horrible (still can't figure out exactly what it is, thought it was my s-fmu). I either have to take off from a stop like a bat out of hell or like a little old lady. No in between slipping or else it'll chatter. I don't have problems with it slipping though when getting on it, it'll grab pretty nicely. I've had the occasional slip here and there but other than that it holds well. Needless to say this clutch has definitely made it a lot less fun as a daily driver.