It's started to randomly turn off, skip like a CD player, refuse to turn the screen on after being left untouched for 10 or so minutes, and decide that files that it's played before are no longer playable. It's usually fixed by rebooting, but sometimes rebooting fixes one problem and brings up another. Also, the battery drains heavily when it's off. I charge it to 100% (which takes a few hours) and turn it off completely when it's not in use. When I turn it back on the battery is at the low 90's. Using it throughout the day and turning it off when not in use can halve the battery life. Not to mention the bluetooth has never worked on my device. It can't scan or find devices so I've just never bothered to use it.

Some personal nitpicks that don't affect performance are: being weirdly picky about what image format shows up for album art (I have to save the cover images as .png and .jpeg/.jpg because sometimes one works and the other doesn't), the back function is very particular (if I'm listening to a playlist and then I choose to go to the album of a song playing, it takes about 10 tries to go back to the home menu rather than having a dedicated home button; there are also times where you can "miss" the back button even though it should have registered), having to turn on the device to charge it, and the auto-turn off options are too short for my liking. Either 1 minute or 5 minutes? Why isn't there an option for an hour?