I particularly like their videos about room acoustics and in-depth guides on setting up audio-equipment. They tell you lots of things a product manual won't. Basically they put in a lot of effort and in the end sum everything up in an easy-to-follow format. VERY helpful!I like the Audioholics guys (Gene and Matthew Poes) for the most part.
I'm not qualified to rate anyone, so there is that. No need to tell me I'm wrong