The ColorFly C3 is a nice little DAP. With good sound quality. And is all very well if it works. But the user interface is rather bad and glitchy. My unit started doing strange things. Like flashing and skipping songs as if a button was held, it was impossible to select a song o manipulate the DAP in any way. It was unusable until reset. And that happened every 30 minutes. Very dissapointing because it started acting up not very long after buying it. Totally put me of any Colorfly products for future purchase.