I felt obliged to create an account just to respond to this question. Yes, I have used this course and I found it extremely useful. There are about 73 videos and they cover a ton of information. If you’re a little unsure about some of the math you find in shaders, you will have a much better understanding after these videos. If you ever wanted to know every step of the rendering pipeline, all of the transform spaces, details and differences between standard lighting, advanced lighting and brdf lighting, you will learn all of this.
Let me put it this way. If you can spare the money, the information you get out of the videos is well worth the money and it is the most comprehensive set of tutorials I’ve ever seen. FYI, I don’t know the guy that gives the tutorial and I get no benefit from promoting this video other than trying to help share this valuable knowledge. I believe these videos are also hosted on another site for a slightly different price. You can also find shortened versions of the videos on youtube. Check those out if you have any doubts.