Morag MacNeill learned Gaelic as a teenager. She was a full-time primary school teacher and now works as a supply teacher, mainly in the Gaelic medium. She has done extensive teaching of adults within night class, adult education groups and organisations.
As a source of useful phrases, this book is rather good. Niceley re-done in the new edition.
My bugbear is the "pronunciation guide" which uses rehashed English syllables. That's always like trying to describe a Monet painting using no more than 2 colour terms. The two languages just don't overlap enough in pronunciation for such a guide to be useful. Better not to add one because if the outcome is Gaelic no native speaker will ever understand, what's the point?
I give it a 3/5 because the whole book is not read out on the disc. As it is quite a hard language to pronounce. Unless you are a gael you need the words read for you or you could get it wrong. This is especially bad since the pronunciation of words in Gaelic is crucial. The difference in the length of a letter can change the meaning.
This book takes the approach that since most if not all areas where Gaelic is spoken they also speak in English too that you may just want to learn phrases, jokes, etc. Not a dictionary and not much on their grammer.
Wonderful book for reference! Lost a star because this edition is outdated. Probably getting a revised edition is the best especially for those who are not familiar with the language.