Yep They are the best this walkthroughs, we have a great expression in Portuguese to define MrBubu diagram walkthroughs, we say "Primeiro estranha-se e depois entranha-se", the literal translation is "First it seems weird but then it gets ingrained/gets on your skin". At first when looking at them I thought "what the heck is this, seems confusing" but then while using it more and more and in other games, reaches a point that seems all other text walkthroughs are made by amateurs hehehe.
They are easy to follow and to read, if you end up having some problem with a path or some scene not triggering it is easy to backtrack the variables thru the search function "#XX variable", even have useful help for whom use URM like I do. Even the bugs MrBubu notice they put a note in orange background. Whenever I'm helping someone on a game thread that MrBubu have a walkthrough, I always use it as a backup to explain better my point of view and occasionally take screenshots of it to aid other players understand it better.
Totally professional work. 11 out of 10.
I'm gonna copy paste it and make this my first ever review on the site. Maybe this give me "courage" to start reviewing games too hehehe.