Meh, I really wanted to love this one. But then the personal anecdotes are nice, but not enough to really make it a worthwhile read for me. And at the same time it seems most of the linguistics recited here come straight out of Guy Deutscher's Through the Language Glass. Which I had read earlier this year (and loved).

tl;dr: too little new for me to have much fun. Worthwhile for people in bilingual relationships that haven't run into much linguistics before.