I started on Gilenya early this year in May, and I've been doing really well with no side effects. My blood work came back normal and my vision has not been affected. It's very low maintenance and a once a day dose. I was observed for six hours at a clinic when taking my first dose to monitor heart rate and blood pressure. That's it. Also, make sure you take advantage of the $0 copay offered by the pharmaceutical Novartis.