I was prescribed Modafinil (the original name for the same drug, brand name is Provigil) for my chronic fatigue, but couldn't actually get it because my insurance company wouldn't cover it due to the fact that it is only approved for the treatment of narcolepsy; using it for fatigue is considered off-label.
So, unfurtunately I don't have any personal experience to offer, but I did do a ton of research on it a while back. There's a great forum called Bluelight that's about drugs and is focused on harm-reduction, and has lots of people's personal experiences - everything from junkies doing really dangerous stuff to BioChem PhDs having advanced discussions.
It's a great resource if you want to find info about a drug that isn't just marketing from the pharma companies. I consult it before taking any of the awful prescriptons my docs hand out, and I've prevented myself from taking some potentially addictive and dangerous stuff (I had one crappy neurologist who would just mail me SSRI antidepressants at random with no follow-up).
Below is a link, if you want to check it out:
Modafinil -- thoughts and experiences [Archive] - Bluelight