i agree, great for free stuff. It helped me for sure.
HOWEVER, they do dick around a lot and they drag their feet. Another thing, is (during the hammer videos) they'll totally mess up. It's like they didn't prepare. I felt like he really wasnt a wiz (the russian guy). Again, it's free so what i am i complaining about. Better a black and white tutorial online.
Speaking of which, anyone read the "Level Design" articles on gamasutra? great stuff. I'll link to it:
http://www.gamasutra.com/features/20061026/luban_01.shtmlclick on the author's bio to get to the other 2 parts of the series.
I always find it a pain to log into gamasutra...