"The Audible.com presentation needs some work"
This Pimsleur series is outstanding, but pricey.
The problem with audible.com's delivery of these five lessons is that they show up as a single track, a single .mp3 file. This makes listening to them a chore. It should be possible not only to skip to a different lesson, but to skip to parts of a lesson. For example, each lesson ends with about 5 minutes of a workbook exercise. I want to skip this part as I can't do it in the car. But the single track prevents me from skipping it.
Burning it to a CD from iTunes doesn't really help: it breaks the five lessons into several sections, but it breaks them by time. So the start of a particular lesson is always in the middle of a track. When you advance to the next track, you can't tell if you're in the same lesson or the next lesson.