I found that Knuth's reputation for eccenctricity gets in the way of actually getting to the meat of the book. For example, getting the programs to compile under Windows was not as straightforward as it could be (although not that difficult). Much harder was to get used to the idea of using CTANGLE and CWEB in order to get Graphbase to a state where you can actually compile it.
It does not help at all that Chapter 3 of the book is when how to install Graphbase is actually discussed. Just for these alone I have to give the book a 3 star rating. Perhaps I will change this once I have had the opportunity peruse the _real_ contents of the book.