neither trigger works it's as if they are not even present in any app or game. the left analogue slider constantly drifts upwards even when you aren't touching the controller at al. and the start/select buttons can not actually be mapped in any game because all they do is mimic the menu and back buttons at the bottom of the s4.
anyone who was thinking of getting this for gaming on their s4 i'd say to avoid it. after trying a couple of different controllers now i'm thinking i may have to just admit that all these bluetooth controllers are a waste of time and i'm better off just sticking to my wired ps3 dual shock pad. shame that this can not be wirelessly paired without rooting, as i need a stock/untouched device in order to run sky go app (very much needed).
another one to definitely avoid is anyone on ebay selling wii u controllers as "android os" compatible. I found out the hard way that they are just referring to it's compatibility with some android based apps on the wii, and will not pair with android devices at all.
just a heads up