In addition to the other commenter I agree on the podcast thing but it heavily depends on where you are cycling and how hard it is. If you are in heavy traffic, it's a bust. But if you are in a fairly quite road it's fine.
It's also worth noting that the audio quality is not brilliant but it's good enough of you are an average music listener.
I basically never take mine off, I wear them at work and even wear them in bed so I don't disturb my wife.
I like data, I'll give it a go.