I have recently tried it @ 1000mg 2 times a day for about 4 months. It helped tremendously with inflamation and back/"lung" pain and discomfort. Be careful though, as caitlin said... I noticed I became addicted to the false sense of comfort it gave me, and when i missed a dose it felt like it hurt even more than before, also got severe headaches. Apparantly, it is also not good for some CFers livers if taken for too long at high doses.
If you decide to try it, keep in mind alot of us have tried it. I think its great, but on top of all of the risks and adding another set of pills to the coctail we already swallow daily, is it really worth it just to put another "band-aid" on? I stopped it.
I hope it helps you if you decide to try it. <img src="i/expressions/face-icon-small-smile.gif" border="0">