The website itself sucked, the quizzes weren't very usable, but the videos themselves were wonderful — in my opinion the best. And I wouldn't be surprised if that was the part that's hardest to improve on, and also the most important one.

I think some of the frustration may be due to Thrun and Norvig style of asking questions he has not yet fully explained and requiring mental leaps.

This seems uncomfortable at first and getting things wrong is hard to bear in the short term.

On the flipside a better and more long lasting understanding is gained from working things out rather than just learning facts.

If they had waited till it was perfect perhaps it would never have happened, teach early, teach often.

Which one is the best?