Bests & Worsts Reviews from Amazon

I upgraded from a Logitech M545. You can see the M545 on the right in the photo. The MX Master 2S is a wireless mouse, but I was charging it at the time of the photo. The MX Master 2S looks a lot grayer in the photo because I had a bright lamp directly over it. The actual color of the mouse resembles #3F3F3F (google that hex code to see the color). I am used to medium to small sized computer mice. I decided to order a new mouse because I was upgrading the rest of my Mac setup. So far, I really like the feel of the MX Master 2S. The mouse will fill your entire palm. PROS: 1. Feels great. I originally thought I would hate the thumb rest, but I really enjoy it. 2. The free scroll setting for the mouse wheel is very smooth. 3. The thumb scrolling wheel feels great. It is not easily bumped by your thumb. Even if you do bump it, it will not scroll much, if any at all. It has a little weight to it. 4. The side buttons don't feel awkward, I don't have to reach my thumb very far to press either one. It's a very natural reach. 5. The customizability with the Logitech software. You can set custom actions for different applications. 6. The thumb rest is also a button (harder to press than a mouse button so you don't accidentally press it). 7. Wireless. I have a bluetooth keyboard (Logitech K811) and didn't want to clutter my workspace with wires. CONS: 1. The mouse wheel in it's "normal" mode (not free scrolling) is louder than expected. Keep in mind that I am used to smaller mice where the mouse wheel is virtually silent. When the wheel is in "free scroll" mode, it is virtually silent. 2. The larger grip might feel weird to you if you aren't used to it. EDIT after a few weeks of usage: My only complaint is that this mouse, at this time, appears to have issues with my MBP mid-2015 Sierra v10.12.5, when more than two bluetooth devices are in use at a time. It's rare for me to have more than two bluetooth devices running at once, but on occasion I'll plug up my PS4 controller to play games. The mouse will sometimes skip/jump around, but I can't confirm if this is an OSX issue or an issue with the mouse itself. I have customized many buttons to perform different actions in different applications. This pairs extremely well with other programs like BetterTouchTool which let you map custom keys for even more custom key bindings.