I have had Allen and Heath DB4, Ecler Nuo 4, Evo4 and pioneer mixers before this. The sound quality and the summing here is so so so good it is difficult to describe, tracks that shouldn't blend become seamless. There is a learning curve so be patient and don't expect it to be the same workflow as 'normal' dj mixers but you will be rewarded with an exceptional piece of gear and the ability to belnd so smoothly. There are many comments online regarding the fader curve, it's true there is a bump near the top but you can use the other controls especially the filters to mix very smoothly. I mix vinyl, classic trance, progressive house 1990s to early 2000s and also modern techno and melodic house music. The vinyl sounds amazing, so fat and detailed.