I found out about this program from my wife...
Giam, a French native speaker, recently moved to New York about five years ago. He recently married a lovely women from Hong Kong. Giam was so lucky to find a Cantonese language school just at the right time. He found out about this program from his Chinese wife. The most challenging part of Cantonese is the system of tones in the language.
Now when Giam goes food shopping in Chinatown, he surprises the vendors with Cantonese language. They love it. This program has helped Giam speaks Cantonese with confidence.