Hi Sue
This is such a difficult question to answer, really you should discuss it with your consultant, you have to put your trust in someone or try to get a second opinion.
I know several people who have benefited with long remissions and some even had a second STC because the first was so successful, unfortunately mine only lasted just over a year but since then the new drugs available have kept me in remission except for a few episodes.
Really only you can decide, try and get all the information you can and speak to many people especially those that have been through it.
Peter