I bought an Akai MPK249 tried it with tons of stuff only to be frustrated constantly and deeply frustrated, I mean by the time a person assigns every midi parameter a person is just exhausted and it's time to go to bed. I tried this app and it worked PERFECTLY IN JUST SECONDS!!!! not only can I get instant gratification, this is the very first time that my keyboard plays drums on the pads and another sound on the keys!! the whole reason I bought it, and I could NOT get it to do that in cryptic expensive things like Logic Pro and other "top" DAWS. Now I can boot up the Mac (intel 64) and be playing music in a second!!! THANK YOU SO VERY VERY MUCH!!!!!!!!!!!