Learning Mandarin by CD

After 6 or so years I’ve finally had to come to grips with the fact that I’m not going to be able to learn Mandarin through osmosis. I’m curious about learning through a CD language learning program. I know that the best way would be to attend classes but I’m a bit busy for that so I’d like to explore this option to see if it’s workable. At this stage, I’m not really interested in learning to read and write, but rather to speak.
To that end, I’d like to hear people’s opinions and experiences with this method, and if they’d recommend any particular program.