Some useful observations inside, but this book is nothing special.

You can obviously tell this is one of his early works, which is not quite up to the standards of the later Wodehouse. But this one is in my opinion better than most of his early works and it was certainly enjoyable. 

I'm a sucker for anything Wodehouse, and any book that'll actually tell you a little more about who he was, what kind of person he was, .. He doesn't tell you much here, but he does open up a little bit. I'll take anything I can get, we'll get nothing more from this wonderful man.

This is far from 'the best Wodehouse book I've read', but if you like his books you'll want to read this one.

Wonderful stuff.

This book is very long and very detailed, however it is not particularly engaging. In some ways I regret finishing it, as it was not really 'worth it'. 
A major problem with the specific 'version/edition' I was reading which made the book a lot less fun to read: In the Amazon Kindle description I was made to believe the book would include maps. There were no maps, no links, no nothing, 0, zilch. Some people would give the book 1 star simply on account of this alone, and I'm not sure I'd take issue with this; when every second-third page of a book describes how town X is North-East of town Y or how the idea behind the tactical maneuvre covered in these pages was for military unit A or B to link up with town Z or reach bridge Q - if you have no maps, you have nothing. This omission makes the book really difficult to read. You either look elsewhere in order to bridge the gap and avoid having all those geographical locations not just be random words in a book, or you give up on actually understanding parts of the coverage; most likely both to some extent.

It's a funny and very original setup for a story. I liked the first story the best, the second and third segments of the book were not quite at the same level. You'll want to read all three of them if you finished the first one, though.