My young son had wonderful results from FT with his mother as his donor. Dr. Brandt was a big part of our success as he guided us via emails. Here is my two cents as to why this works for some and not for others.
We know that UC care will be very personaized in the future. Research has proven UC to have several subsets of disease....each needing a different treatment protocol. This will be big news discussed over the next couple years. If I'm not mistaken, DNA classification will be used to determine what category of disease you fall into. For now, UCers get tossed into the same treatment protocol, and thus, have mixed success.
This must be the reason why FT works so well for some and not for others. I do know Borody now claims a better than 50-70% FT success rate for UC. Protocol is key depending on subset of disease. Donor, duration, etc., must all play a role. Still a lot of unknowns, but at least we are making advancements.
Lastly, I do know increased inflammation will decrease your odds of FT success. Thus, adjunctive use of meds may be important. Congrats to all FTers finding success, and good luck to everyone else.