I have read the majority of the innings listed in this book now and really enjoyed a couple of things about the book: 1. The most rigorous, balanced and scientific approach to comparing batting innings I have seen yet. Only some of Cricinfo's blogs have come close. Great to put peoples' innings in context and perspective. And therefore get past the hyperbole and blind worship of so much of the modern coverage 2. Highlighting some forgotten historical innings that I didn't know of that are really worth finding out about 3. Great level of detail in the top 25 innings with new information and points of view I hadn't seen before (even though I am pretty well read on some of my favourite innings)
However, I would say it isn't perfect. Their ranking is very sensitive (author's own words) with many of the innings grouped together. This means the subjective tweaks they make have a bigger impact than I would like and leave some doubt in the ranking. As demonstrated by the lack of some of Gavaskar's innings against the great WI sides and the lower ranking for the famous 281.