TLDR; This mouse feels much like the Abyssus 2014; it is essentially the same design with some nice additions, and is a worthy upgrade to the 2014 edition. New rubber side grips prevent slipping, and lighting effects are quite nice, though limited. If you like smaller mice, or grip with your fingers, give it a try. It requires 'synapse' software for full functionality, though this version has less dependence as opposed to previous models. Four stars because the first one I received had defects in the paint/ backlight area. Replacement works great.This is a smaller mouse, and works well for games, as well as things like Photoshop, Blender, etc. The design of this mouse works well for how I grip my mouse; I rest my palm on the desk and control my mouse entirely with my fingers. Bigger mice like the death adder do not work for me. Even the Kinzu feels a bit fatiguing.First, the rubberized grip. The 2014 model had a texture on the sides made of plastic, and was actually kind of slippery. This mouse solves that problem, the rubber is grippy and makes the mouse feel more comfortable.This version adds a physical DPI switch on the mouse. This is something I felt the 2014 model left out and is an excellent addition. I am comfortable with the 1800 DPI setting, but it is nice to have the option to switch WITHOUT software. To change the DPI steps, you'll need to have the software running, unfortunately.This version also adds lighting effects.It is limited to Green, blue, or a mix. I'd prefer the full spectrum of 'chroma', but at this price I guess I can settle for 3 colors. The logo and the scroll wheel are illuminated this time. I wish it had the option to fade between the three colors, Instead, you can pulse (fade to black on and off) between the three colors, or with one color. You can set different colors for the logo and the scroll wheel, but not different effects or brightness level. The 2014 version seemed to be limited to "pulse", and I really disliked that. You can also set the lighting to "off" when you get sick of it.There is a new sensor in the mouse that differs from the 2014 model. I won't pretend that I have researched the difference, but it definitely feels better. When I lift the mouse up from the pad, there is less movement, which is good. The mouse buttons sound a bit louder and feel like they have a bit more resistance than the 2014 version. I'm not sure if I like this or not, but I've not used it long enough to say. This could also be because it's brand new. The 'click' is definitely louder.The only cons for me is the synapse software. You need to have the software installed to set up and use the mouse properly, the software requires you set up an account and requires an internet connection to download compatibility for the mouse. I don't like these extra steps, I'd prefer to just download the drivers once, and install/reinstall as needed. Using the mouse as designed, you must keep the software running in the background.If you like smaller mice, or grip your mouse with "finger tip grip", this might be for you. I do prefer the original abyssus's shape over this (mainly, the mouse buttons curve allowing your fingers to rest in the cradle of the curve), but the rubberized side grip and quality of the scroll wheel on this version help make up for that.I will update this as needed.