Copaxone is reported to be about the same effectiveness as the interferons,
for reducing relapses. It is not yet clear whether it is effective in delaying disease progression and disability.
There are others here on this forum who have been on Copaxone longer than I have been, who may let you know how they have responded to this med.
Also, if you search this forum, you'll find previous threads on Copaxone, some pretty recent.
Are you on this medication now, or considering taking it?