In 2003, I switched doctors. I'd had a resection of the terminal ileum in 1999, and I was scared and feeling very ill--and my previous doctor had just shrugged off my symptoms, telling me that I'd be "fine" because I had a "great attitude." I developed a perianal abscess, fistula, and chronic fissure, and she wasn't responsive. When I switched doctors, I had my first SBFT, which revealed a footlong stricture in my terminal ileum.
The new doctor put me on 50 mg daily on 6MP. Like you, I had very few (if any) noticeable side effects. Even though my day-to-day symptoms (endless diarrhea, for one) continued, another SBFT in 2006 revealed that the stricture had totally disappeared--which meant that we must have caught it when it was still composed of inflammation and not yet scar tissue.
Since then, I've continued on the 6MP. I still have my usual symptoms, but I haven't gotten worse or required any kind of surgery. No abscesses, no fistulas, no severe abdominal pain, just the usual discomfort and bathroom runs. My doctor considers this to be a great success. So do I, since it's now been 10 years since my resection.
6MP has pretty much been a miracle drug for me. I hope it works really well for you.