Pros: durable, small
Cons: white noise, feedback
Audio Quality-some white noise. Feedback when strapped to iPhone.
Quality-Very durable and small.
Design-You cannot use it while charging. It also is easy to bump the volume know when in your pocket.
It came with a dented battery cover. It wouldn't quite close. FiiO sent me a new battery cover, no questions asked. They also gave me a free FiiO t-shirt. Very satisfied.