Akai apc40

Well the buttons are a bit smaller than on other pad controllers, but you have more faders and knobs to make up for it.
As far as Ableton Live controllers go it is absolutely nice and works well with the standard Ableton mapping.

I have never tried to map it to something else than Ableton, but of course it may work. Just was too much hassle for me as mapping all those buttons and faders and knobs seemed like to much of a hassle to me.