I bought this book ahead of my nephew (whose a pretty adept gamer) coming to stay for the weekend.
It enabled me to hold my own with him - nuff said!!!
Seriously, if you've never been particularly good at MK, this book will sort you out a treat. And of course you can impress with knowing how to unlock all those secrets in the minimum time.
Only drawback is it doesnt contain a full breakdown of the contents of the Koffins, which I thought was a bit prissy of the publishers - if I'm paying money for a guide I dont expect them to be selective in what they include!