Yep, played with eq and it can be tweaked to maybe even outperform vibereffects on the stock player. UI on Hiby is not to my liking, to many clicks required to add song to playlist, to return to now playing etc. It is responsive and sounds better than Power AMP, Neutron, Onkyo etc. I still prefer FiiOs stock player UI everything is logically laid out and 1 click is all you need for most of the action. I'll very likely (like I did before) revert to FiiOs player after few days of playing with Hiby.