«  Quality MIDI controller »

I utilsais not bad for Ableton, I must say that it is a MIDI controller really good quality, but the rub or, was that you had to adapt to the way of working of the apc is to say just lauching (trigger) clips, and use knobs (knobs) for different effects. All that remained quite limited, given that you can not assign, very easily config. twelve o'clock another only via midi learn. One between your DAW software and hardware would have been more! Similarly you can not utilez 64 pads for twelve o'clock launcher notes drum rack, this has been fixed in the APC20 version and is available on the launchpad, you can still buy a config. similarly for a few dollars more, this address has http://www.nativekontrol.com/apC_Series.html, speaking English is advisable, I did not, but it will add and give its full dimension the apc40, of being much more versatile. Otherwise even without AC, it remains a great mixer with faders quality, it was the first that I did use, and it ca maquera me much, but I was forced to sell to acquire Push the Akai.
Price level, I would say it is qualified by its superb quality, and given that the push comes, its price will remain around 200 €, which is a must at this price mixer, but if you a good portfolio, I adviserai anyway to invest Push if you want to operate Ableton Live 9 in all its glory and have a midi controller of versatility to the extreme!