agreed that it is a difficult and very personal decision. In 94 when my MS was probable/possible the docs said that there was little they could for me. In 1998 I got the definite dx and the chance to choose/try the treatments. I believe that Copaxone is helping me and I am grateful that treatments however imperfect do exist.
something of interest- this article on the web

New Analyses from 16-Year Follow-up Trial with Betaseron Demonstrated that Early and Sustained Treatment of Multiple Sclerosis Patients Enrolled in the Trial Affected Their Long-term Outcomes

best in your decision