I took E. Coli Nissle in Mutaflor for over a year before the FDA banned sales in the U.S. I found it helpful but not more so than VSL#3DS or Culturelle. Those are my two favorites. Everyone is different so don't worry if a particular probiotic does not seem compatible with every individual.
This is from a very recent thread and may explain why a probiotic that works for one may not work for everyone else:
Imagardener2 said...
This article www.sciencedaily.com/releases/2011/04/110420143620.htm indicates that people may have different gut types, meaning different types of predominant bacteria in their gut.