The Greatest Mouse Ever (20 month Owner)

Let me start by saying that I’ve used many mice in my days and this is the greatest I’ve ever used. It takes the proven ergonomics Logitech deploys in its higher-end mice and builds on that to provide great features.
Ergonomics
This mouse is only for people computer right-handed. I’m a left-handed person but use a mouse with my right hand so I’m fine with it but if you use it left-handed then this mouse will be a nightmare to use, don’t even bother. That being said, this conforms to your right hand amazingly. It fits the curves of your hand so you don’t have to use any sort of awkward grab that tire your hand out, it just feels natural. The buttons are all easy to touch and very accessible.
Buttons
This mouse has an assortment of buttons, the most innovative of which are the 2 to change sensitivity on the fly and make it quicker or slower. The most useful are the tilt buttons. If you push the mouse wheel to the left or right then you toggle the 2 buttons there. This is great for gaming because you can have a push-to-talk key that lets you stay on the trigger but with the Logitech software you can let any button on the mouse perform any function
Batteries and Wireless
I’ve used wireless mice before and had given up on them before this mouse. The batteries were a hassle the wireless signal was terrible but this mouse changes all of that. The signal is great, I’ve never lost it, and the battery system that Logitech set up is the most intuitive system ever thought of to deal with batteries. You get 2 quick change battery packs so you can literally switch the charging pack with the dead pack in less than 2 seconds. You just tap a button and it flies out the bottom, allowing for a seamless switch if you’re gaming or doing something important and the software warns you when the battery is getting low.
Overview
If you can afford it, this mouse is entirely worth the money. I’ve had it for over a year and I still love it. I’ll be using this one until it falls apart.