Just listening to the first episode as this sounds like the perfect thing for me in my current situation. One suggestion would be to work on sound quality, the biggest issue being background noise. Audacity [0] is an open-source software for editing sound. There's even an awesome tutorial on removing ambient sound [1].

[0] http://www.audacityteam.org/

[1] http://www.makeuseof.com/tag/remove-ambient-noise-audio-file...