WAAC
I am currently doing the Modular JAA Theory course with WAAC and will be sitting their first CAA exams in a few weeks.I have a AUS ATPL with turbine multi crew time and am converting to a JAA ATPL.
So far all they have been very helpful and efficient with the course. I have had a few small issues with logistics etc. but all have been resolved quickly. Their course material is under licence from CATS and we have access to their CBT and forums which is of excellent quality.
Cheers