Excellent resource for anyone going through the academy/basics. I mostly used it as a quick reference and supplemental reference material, and it helped a ton. It provided an easy way to look something up on my phone/home computer without having to dig out my lesson plans. The included tests also helped gauge mastery of the course material in a pretty effective way since they do differ from the official end of lesson tests (a point I consider a major positive since it wouldn't make sense to pay for a carbon copy of the quizzes already provided through the course.)
Highly Recommend!