The site is kinda in a transition at the moment. (Especially my own section)
I've got videos and other lessons in there that date back 8 years and it's only just the last couple of months that we finally decided to redo everything and make everything Hi-Def and combine various lessons into step by step tutorials etc.

Basically what you'll find is old videos and MP3 lessons that we did when bandwidth was at a premium several years ago.
Then a couple of years ago we redid everything in a slightly higher grade video.

Then we just realized that Hi-Def was the way of the future so we're kinda re-inventing ourselves right now and redoing everything all over again. (hence the new site redesign)

Personally, I'm filming several videos a day to replace all my old ones, as well as fill them out with more detailed explanations, Jam and MP3 files and transcriptions rather than the old text tabs.

So basically, for now you'll find a mixture of everything from old lo-fi lessons to updated Hi-def stuff. (although the old stuff isn't missing anything in terms of information or quality... the videos are just a bit more grainy)

As far as whether it's worth it... I can only speak for myself in that I've received literally thousands of emails praising the lessons and only a relative few that wanted more details given, which we're always happy to provide.