2 stars, I guess? Didn't hate it, didn't love it, it was just very pointless. If you want to know more about his career or life or whatever, you would probably be better off reading his Wikipedia page and a few interviews (he has talked more about every one of his experiences in interviews than in his own book!). That said, I can now said I've read 2 full books in catalan (and I actually think I also gave the other one 2 stars but that's not important), so good for me!
I Think this book is a very good book. You can understand what some people have to do, when they try to make their dream real. Gerard Pique when he was young he was playing for F.C.Barcelona. but in Barcelona is very difficult to arrive in the first team. He when to England to try to play soccer, and he did it pretty well. After some years in the Manchester United, the F.C.Barcelona was interested in take him again. The book explain how he did all to improve and come back to the team he always wanted to play, and the team he loves, Barcelona. Right now he is one of the most importants players in the F.C.Barcelona, and he's a star for all the F.C.Barcelona fans. If you really like football (soccer) it's gonna be a very interesting book for you.