Hi.
I found it great. It took nearly 5 months to kick in but I have been very well for over 3 years now so much so that I have made some major advancements in my work and career.
Side effects for me : Brain Block - not serious but sometimes ordinary words get stuck and I occasionally lose my train of thought - also recently my bloods have shown low platelet count (but I think this is very individual). No other side effects of note although at the begining you feel a bit funny but passes after a few weeks - feeling of being kind of aware of your body.
BTW: while I was waiting for the immuran to kick in I was on Asacol and steroid enemas.
Good luck