My only minor quibble with Didi is that she (page 219) eats fish on occasion and thus considers herself a "95% vegetarian". For a vegan, the suggested use of "fish sauce" in a vegetarian recipe book is annoying. However Didi does suggest alternatives - and her recipes are fine without it.
A good friend suggested that the lone negative reviewer may have substituted some other yeast for the nutritional yeast called for in many recipes, I'm sure she's correct. Folks, there is NO substitute, you need genuine nutritional yeast (mild and cheesy) - NOT brewer's yeast (bitter), and definitely not (shudder) baker's yeast!