I've been on Fingolimod Accord (generic Gilenya) for a year, Gilenya for 8-9 years, and before that Rebif for like 13 years? Medicated at 18, ill since 12. Never felt better really. Symptom free and side-effect free.
The Rebif was kicking my ass with its side effect, I attribute my constant intrusive suicidal thoughts during that time to the medicine, but other than a lower-than-normal heart rhythm I am a very happy user of my current medication.