Finally someone has made a decent stand-alone playback rig. If you want to bypass having a laptop on stage, or you can't afford to have a Nine Inch Nails-style playback tech, this is the way to go. Laptops aren't reliable. You will have issues live at some point. The 16 mono outs make it possible to adjust individual levels easily, unlike the Roland SPDs-x running a backing track, where that track is a single mono or stereo WAV. Don't sleep on this one.