First post to the new community. Almost 25 years club and mobile djing and producing. I play primarily house music and what I like to call groovy urban. Big rig is a Bozack rotary, technics and SSL, but I needed something more mobile and flexible. The MC4000 is really a nice point where size and functionality meet. I love the fact that I can use it with SDJ on my laptop or Algoriddim djay pro on my iPad (unofficially supported through the djay Mac mapping). It makes for a very flexible set up with multiple back plans. They were really thinking about working DJs when they designed this unit. Nice work denon.