I love Lonely Planet products and was very impressed with this Mexican Spanish guide book. When I went to Mexico for a week, I took this book everywhere with me. It was a big help since I did not speak a lot of Spanish. When I would ask locals questions from the phrase book, they understood.
The guide was filled with interesting tidbits of cultural tips that were mixed with a bit of humor. Also, this book had many helpful coloquial terms that you cannot learn in the classroom, like curse words and words for flirting. The sections were well organized and easy to find. I also loved that it had a very long and thorough food dictionary. Only maybe once or twice I couldn't find a food item in the dictionary, but all the other times it was listed.
The only thing that I wish this book had was a more extensive dictionary so when you wanted to form your own sentences, you can look up specific verbs. Also, the book doesn't teach you verb conjugations for forming sentences. Otherwise, the book is great for just simple phrases and quick questions.