I have been on 6-MP for almost 3 years now. It has overall been great. I was nervous about the side effects, but once I got on it and everything went smooth I was happy with the results. I have had a little bit of hair loss (in the beginning), and a touch of acne, but that is it. It took about 3-4 months to kick in. I had a a long 2 year remission with this medicine. I had a baby about a year ago, stayed on this med and everything went great. I have had trouble getting back into a nice remission like before, but I think after some time on prednisone things are good again.
I do not have blood, pain, or many urgency issues. I have severe PanColitis and really struggled to get it in control when I found out 4 years ago. Now I go 1-2 times a day and actually feel like a semi "normal" person.
Good luck to you!