Copied from a reply to previous thread:
I think that I have an open mind and enjoy receiving all sorts of training but unfortunately I have to say that I have never left a two-day Instructor Seminar feeling that I have learned anything that will markedly improve my technique or expand my knowledge. This is not the fault of On Track who have a well-qualified and experienced cadre of lecturers but rather due to the somewhat mundane subject material. 'Effects of Controls', 'Navigation', 'Stalling', 'EASA part FCL' and 'Carb Icing' were some of the more memorable items covered.
I would much prefer to learn about: iPads in GA cockpits, Sky Demon, Garmin and Avidyne EFIS displays, Single-pilot CRM, Lessons learned from recent light aircraft accidents, SERA, GNSS approaches, etc.
The seminars do however give one an opportunity to converse with like-minded pilots and therefore hear a few interesting stories over coffee. I don't begrudge the fee and the two days spent, as I need to tick two out of three boxes, but I do wish the exercise was more useful!