I think I got mild benefit from it, certainly didn't have any issue walking or getting up stairs for the admittedly short time I was on it ( about a week ), the trouble is I started to feel a bit hot and fevered a couple days ago and its slowing me down, just odd sensations in the body, chest particularly, yesterday my left hand was shaking by itself, not a new experience but certainly different to previous weeks, I think it could be a viral flare up, it doesn't feel like a crash because i'm not experiencing all the weird stomach changes that I get with a crash and i'm not getting really slow like a clockwork toy thats ran out of windings. I never get 'colds' or 'flu' or other viral infections with obvious symptoms since becoming CFS'd, but I do get these weird sensations sometimes.