Being a rabid Daily Mash fan, I've just read this cover to cover. Like any humourous product, it's not perfect but it is more than funny enough to warrant paying a tenner, even though there are items we've seen before.
For the uninitiated, I have two words of guidance: 'untermenschen' and 'schadenfreude'. This book (and the website, which is infinitely funnier than 'The Onion') is aimed squrely at those of us who not only understand the words but can also appreciate the comedy aspect of them in context.
So, sophisticated satirical humour with well-directed profanity. Like 'Private Eye' after it's been on the Stella.