Shanling uses a custom OS although it feels very primitive compared to iPods (e.g. the iPod Nano had VoiceOver for touch navigation). So I'm not really a fan of these dedicated single-function players; modern media player apps can be fast and convenient (more so than a clickwheel, honestly), and Android devices can still have dedicated control buttons. If only these devices weren't so bulky...
Fair argument, these devices (the Hiby R4, in particular, which is the one I have) are absolute tanks. Way too heavy and big to throw in your pocket for any reason, especially if you use a case. Still, it's nice to be able to (sort of) carry my own library around and never need internet to listen to it.
