I have some experience with Photoshop, but I started watching it to study again the functions I didn't know well. It was a function I was definitely using and knew, but it was taught in detail so that I could use it in more ways. It wasn't too light that I couldn't think of anything else during the lecture, and it gave me the impression that it was systematic because it was explained one by one in a businesslike and heavy voice. I recommend it.