This book is not historically accurate. This book is not long; the six stories total a little less than 9000 words. This book is not serious. This book is not clever. This book is not a good example of westerns, nor is it especially good as a general comedy. It pokes gentle fun at the genre in between bum jokes, people with funny names, silly misunderstandings and general tomfoolery. If you're looking for any of the things that I've said this book is not, then I can only suggest this is not the book for you.
If you want some quick western-and-cheese themed fun, then this IS the book for you and you should buy it immediately.