I use a Neutron app as main application.(It too drain batt T_T)
When I want to change/pause/play track, I have to change it by touch operation.
But ZX1 has Hardward buttons so I don't need to turn screen on for changing track every time ^_^.
BlueTooth function is also great sounds.
Better than my previous Z and Samsung Note II.
I don't understand, does it not allow the user to use the side buttons with the stock inbuilt player?
Also the Neutron Music Player allows the playability of files like Ape and so on that are not normally allowed with the stock software, am I right here?