Why then only four stars? Well, I put the first cd into my computer (the only way I listen to them) and it sounded like he was talking in an echo chamber. I have the same lecture on videotape and the audio portion of that is fine. I suspect this has something to do with copy protection. I will be taking the cds to listen on my office stereo to see if it's normal there. Anyway, Tolle is fabulous but I might recommend you try a different lecture if you're listening on computer.