This is definitely a worthwhile purchase for anyone interested in Scottish Gaelic. But one should be aware that there are two versions of this book in print - one with and one without the accompanying audio CD. According to Amazon's description and the photo of the book, the version they are selling does not include the CD, but the retail price and ISBN that they list for this title are for the one with the CD. So someone looking for this book might be hesistant in buying it from Amazon, because you might be paying for the book/CD version and only getting the book. None of the other customer reviews mention an audio CD or whether they actually ordered this title from Amazon specifically, so that is not helpful is determining which version Amazon actually stocks.
If you are looking from the book/CD version online (sorry, I won't name where to look here, but there are other retail sites that carrying both versions, so shop around - or pester Amazon to sort out this confusion), know that the cover of the book should have a yellow banner in the bottom corner reading "Includes Audio CD." It should also have an ISBN ending in 709 (the book-only version ends with 402, and is about $10 less retail). As a student of Scottish Gaelic, I highly recommend getting the book/CD version. Even with phonetic help, Gaelic learners benefit greatly from hearing the pronounciation and cadance of a native Gaelic speaker, as spoken Gaelic is quite distinct from spoken English or other non-Celtic languages.