Very reliable and comfortable, good battery lifespan
I've had this mouse for almost three and a half years. In that time, i've had practically no problems with it. The battery life is exceptional. There's a warning light that turns red when the battery is low; it can last about five days before it conks out. It fits in my hand nicely, and i don't accidentally hit the back button on it like i did with my last mouse.The only drawbacks are minor ones. Clicking with the scroll wheel is difficult as it requires some extra pressure, and sometimes i scroll by mistake in my attempt. After using the mouse for a while, my palm does get a bit sweaty, but nothing major. I've begun to notice that mine has just recently started acting up. It's getting pretty close to the end of it's life most likely. The left mouse button isn't really reliable anymore. Highlighting text has become a real challenge, and sometimes clicking once gets registered as many sequential clicks. The other buttons work as expected, and the movement is not impaired. This mouse has served me well, and i would recommend it to anyone despite these inconveniences. For the majority of its lifespan, it's been a very reliable and comfortable mouse.