I've seen that Mesmer.com and coyote3d.com are offering online courses for learning XSI. I'm thinking of taking one of these courses, but of course I wanna know if these are worth the 500 bucks. So did anyone take one of these courses ? Or got more information bout them, do they go in details or are such courses only an overview about the features of XSI. Especially for the courses of coyote3d.com I can't find much information. And are there maybe other schools offering courses ?