I'm in my 50s and an absolute beginner at Cantonese. The speakers are clear and easy to follow, the words and conversations are useful right from the start, and the 30 minute format is manageable. I play the disks on my way to work.
Each lesson incorporates what you learned on previous disks into the new conversations, so there's plenty of reinforcement while you learn new words and sentences--no need to feel overwhelmed. I'm on Lesson 9, and on a recent visit to Chinatown I was already able to understand some words and phrases.
A little booklet tells you how to use the disks and how you'll know when you're ready to advance to the next lesson. Although the instructions suggest one lesson per day, I find I usually need 3-5 plays for each lesson before I feel I'm ready. You might need more or less repetitions. I feel confident that I'll be "conversational" in basic Cantonese in a few weeks.
I'm really pleased with this product.