As well as showing a load of top movies (as Film Festivals tend to do more often than not) it also incorporates courses. This year the legendary Bill Martell hops over the pond to do one of his masterclasses for the first time in Europe. Leading up to that paid event there are five free classes.
If I have to choose a favourite guru then it would be Bill Martell. His Script Secrets website is a treasure trove of tremendous tips on all aspects of screenwriting. Martell's basic philosophy doesn't differ from McKee but he is more practical and accessible and in addition, as a working screenwriter, his industry nous is useful.
Martell has had 19 action/thriller scripts filmed of the 30 he has had optioned. Although he mocks them, that's obviously impressive. However, it's his cross-genre knowledge and ability to impart that knowledge simply that's more impressive to me.