Traktor S4 MK3 : Best 4 channel controller for the price

I did a huge amount of research on every 4-channel controller on the market based on functionality, features, build, and FX. The only 4-channel controllers out there better than this are at a significantly higher price point: Denon Prime 4, Roland DJ 808, Pioneer DDJ RZ, Pioneer SX3 (Pioneer XJD-XZ isn't even a standalone 4-channel mixer). Way higher quality build than the (relatively flimsier) Pioneer DDJ FLX6, much more functionality than the Pioneer DDJ 1000 or Numark NV II. Quality and robustness of the hardware is really spectacular.

The only drawback anyone sites (look at any blogs and lists of controllers) about this controller is the underperformance it had upon launch. All of those bugs have now been fixed. I've had it now for 2 years and used it heavily and it's been flawless. Only reason you should pick something else is if you want an all-in-one system. If you don't, this is the controller for you.