Having used this in Japan for a couple months, I find this phrasebook fairly useless. We don't even bother carrying it around anymore.
The indexing is poor: meaning that you cannot easily find what you are looking for.
The coverage is unbalanced: why does it spend so much space on phrases for talking to the opposite sex? If you need a phrasebook to ask someone to marry you, then you have a problem! Yet the coverage of useful phrases, food items, etc, is quite weak, with many useless things included and the basics missed out.
The romanization scheme used is non-standard, making it annoying to use in conjunction with other books.