Hi gagomes
Hope Dave won't mind too much me answering on his behalf:
FYI, the assistant is actually the main head chef at Zaal. Az mainly does front of house these days and usually only cooks when the restaurant is uber busy.
As far as I recall the cost was 60 pounds for the session. For that we received around 4 hours really intensive tutoring and then sat down for a late lunch and sampled all the food we cooked plus a couple of extra masalas that Az cooked.
Do I consider it good value for money and time well spent? - would I go again next week if there was another session? - too flipping right mate - in the drop of a hat!
Look around - you will struggle to get guitar lessons for less than 15 pounds an hour! someone offers you a deal like that go for it!
Training in anything is not cheap these days. Just finished a SQL Server performance tuning course for work - that was 2 thousand pounds for a weeks course! something like 70 pounds an hour! time is money

Cheers