I am writing in response to a previous review that was posted from a native Cantonese speaker in Hong Kong. I am originally from Hong Kong myself and have been speaking Cantonese my entire life though I've lived in The United States since I was very young. Listening to the CD's they sounded perfectly fine to me and not at all dated or incorrect and not in any way different from how I speak to my family or friends.
I believe what the previous poster was objecting to in these CD's is that Cantonese spoken in Hong Kong is constantly changing in very subtle ways. The language is essentially the same but imagine the difference in English between Great Britain, Ireland, Australia, The U.S. (The South, in New England, in New York, in the West Coast, etc...)
Its funny but whevenever I return to Hong Kong and I speak to someone who lives there they always try to guess whether I'm from Canada, the US or Australia because I'm not completely up to date on the changes in inflection, slang, intonation, etc...
Overall, a good system to get your feet wet in learning some basic Cantonese. I bought it for my girlfriend who is not Chinese and so far she's learned enough for us to carry out basic conversations in Cantonese. Also, one of the speakers in the CD's has a bit of a nasally voice which does detract a bit from his pronunciation which I've had to correct for my girlfriend.