I just tried the audio CD for the first time, even though I'm almost done with Level 1. I am kicking myself for not using it earlier because it's absolutely fantastic! I've used other CD's before and hated all of them - they never helped me to learn anything. I would just say blah blah blah and never knew if I was right or if I was making mistakes. Having both English and German speakers in the Fluenz CD made all the difference. I felt like I was sitting in on a live review session. I knew immediately when I made a mistake (using sie instead of Ihr, etc) So if there are any other people out there who are ignoring their audio CD - you should start listening and talking to it right away :)