My experience
I was at IFTA twice, in late 2000 and early 2001. In both cases I had good experiences. I got my training completed on time, on budget (actually a little ahead of budget in the second case) and although it took some cajoling, I was able to get Steven to work with my a little outside the box (I had lots of time already, just needed training to proficiency so their structured course wasn't really appropriate).
I flew with Roy (where is he now?), Tim and once with Steven and thought all three were professional and knowledgeable.
There were unhappy people there OK, but to me that was more their attitude and approach, expecting everything handed to them on a plate. Go in with realistic expectations and I think it will be fine. I will be going back sometime soon for my IR renewal.
You can feel free to PM me if you want specifics. I have no affiliation with the school. I work for a US regional airline and live in Seattle.
Regards
Ray