This little standalone is fantastic overall. It has great sound, professional connections, a sturdy build and more features than should be expected in a package this small. My only complaints are mainly software based and hopefully Denon will fix these with updates. For example, you can't choose the order of your playlists, and songs in your playlists re-order themselves everytime you navigate out of the playlist, which is extremely frustrating.
Hardware wise no real complaints but some nitpicks - triggering of effects could probably be implemented better, the cue button functionality could be made friendlier, and a sampler button would have been great.
Overall, this controller is a feat of engineering and I highly recommend it!