if you have any curiosity, definitely try it. it's easy to sign up and free. you receive a password and use it to get in. you choose lesson one and WHOOSH! off you go.
i think that for a more interesting topic there would be a better tute, but i think there are good tutes for free on the web, especially on youtube. this is not videos, and i think videos are very helpful.
nor do i think this will be a step-by-step teaching device. i think it will be more of a seminar. that is, a lecture that you follow along with as things are explained and described.
if you need to learn about something, type it into your search window, add video/tute and you'll get excellent learning material at no cost.
i wanted to find out and i did. i am not that impressed. IMHO
IMHO