Pros: Large Size, and Ergonomics.
Cons: Software is not quite right.
**Edit: So its been around 8 months since my purchase, and around 2 months since writing this review, and I've noticed that the mouse does not track well on cloth mouse pads on very low dpi, around 800dpi and lower. The mouse jitters on the x axis when being moved. This is likely caused by the sensor not reading the cloth mouse pad properly(registered around 30%). Tried the mouse on multiple mouse pads, Razer Goliathus, steel series QCK+, and a Logitec g440 hard mouse pad, and found that only on the hard mouse pad did the sensor read properly, registering around 80-90% in the mouse software. After switching to the hard mouse pad the mouse worked perfectly. But because of my finicky and borderline obsessive mouse preferences in performance, I have retired this mouse. I will be keeping it for general reference for ergonomics and personally will make it my benchmark for how good ergonomics a mouse can have. I have changed to a Logitech G502 as my replacement mouse and will do a review on that when I get more acquainted with the mouse. Still the Naos 8200, just wish it tracked better on cloth mouse pads. Not worth adjusting my score because mouse pad preference is really personal. Still highly recommend this mouse! **