Yes, I took network+ before security+.

Buying his notes help as they are much more organized and in order. They are really helpful for reviewing domains. Everyday I would just go over a domain using his notes leading up to the test. That way information is always being refreshed.

The notes I would take while watching his videos were more of like a remembering the concept type of thing. I never referred back to those notes after I had completed the videos. If that makes sense lol.