Ordered a steelseries Rival 310. I really liked the Rival 300 shape, just needed slightly more grip on the pinky side and nicer feet! Really looking forward to this one.
The ROCCAT Kone Emp... Pinky side is an awkward shape, thumb side is great. Buttons were ok, not as good as Logitech. Sensor felt great but no better than current Razer or Logitech offerings.
Something else that really stood out from using this mouse is how I prefer a thinner base on the mouse. Using a low sensitivity your picking up the mouse A LOT, often the mouse is not perfectly flat on the pad during a fast swipe, the wider a mouse is, the greater the distance from sensor to pad when on a slight angle. Looking at the Logitech G900, the bottom tapers in to effectively reduce the footprint of the mouse, helping this issue. ROCCAT should work on this.
To top it off I think the LED strips are outdated and the weight is not justified in comparison to similar sized mice.
I'll Update when I get the Rival 310.