I have just completed the "Introduction to NLP course" from John Seymour & Associates and was very impressed.
Very good class size (less than 30) with 4 facilitators and John Seymour himself doing the teaching. The quality of the materals was excellent and the delivery was faultless.
Especially remarkable was the level of personal interation and attention that the small class-size afforded. As an "early-bird" it was also possible to get some 1-1 time with John himself, which surprised me a little.

All in all an excellent experience that I would recommend to anyone.