This book is the recommended course text for a beginner Japanese class I am taking. I decided to buy the romanized version as I was doubtful that I'd be able to use the Kana version as a complete beginner! However, I wish I had gone with the Kana version as now I feel like I'm cheating by reading the romanized text, and it's clear that I would have learned the Hiragana and Katakana a lot more thoroughly by now if I was forced to learn the language using these scripts from the start. The Romanized version only contains one section in Kana in each chapter, and doesn't explicitly teach the Kana, further than including Hiragana and Katakana charts at the back of the book.
Nevertheless, I have found the book very useful as an accompaniment to the course. It presents quite a variety of topics, although I would say that it is very focused on business scenarios, meetings and business trips etc, so it would be most suitable to someone going to work in Japan, rather than someone visiting the country as a tourist or traveller. Regardless of the business focus, the book gives a good grounding in grammar, tenses, introductions, shopping, money, trips, transport, days of the week/month, times and so on, with some cultural information at the beginning of each chapter.
There are several central characters used throughout the book which is useful. Each section presents some target dialogue, new material and several exercises. The exercises are sometimes a little repetitive and easy, but are a good way of making sure you know the material, and would be a lot more challenging in the Kana version.
The accompanying CD is useful, containing the target dialogues, other short dialogues and listening exercises.
I would recommend the book certainly, but alongside a couple of others that focus more on the Japanese scripts and on Japanese literature. There are some very good compilations of short stories available in parallel text from the same publisher which I have found very useful, such as
Breaking into Japanese Literature: Seven Modern Classics in Parallel Text.