An interesting link indeed.
These are the type of courses I prefer, ones where you are listening to and working with someone who has been there and done it, not ones where they are run by salesmen and people who are just out to sell you their products.
For £75 it's a fair price for a day with a compact group of people, only problem for me is the location, I may email him and see if he fancies doing one either before or after the Cleaning Show, anyone else fancy it?