My neuro wanted me to go on it right off the bat (first medication) since I have a seemingly rapidly progressing course of MS. I am in Canada, and it's been around for about a year I believe. They're seeing excellent results.

If we had insurance, I'd be on it right now. But it's not covered by our gov't (yet) and certainly isn't as a first line drug. I'm on Beta now and will go on to it if our health care decides to cover it (they think it will in a year or so) and if Beta doesn't seem to be helping much, I'll go on it.