This thing is the bee's knees ^_^

Super smooth, easy as to assign macros, the 2 scroll wheels are awesome – I have side one set to scroll between tabs when browsing the internet – is very handy and speeds up my work :D

That cool textured bit for your thumb is actually a button too! press it in and you can assign a macro, press it and move it a certain way and it will do something else. I have it set to my media controls – very handy.

Very ergonomic, high quality build. The ability to sync to multiple computers and then have different profiles for each one is very hand (work/home use)

I am mainly using this for work and then slaying noobs at home with my Logitech G302 MOBA mouse (highly recommended too!)

You won't regret this mouse :D

A great mouse to use. A tad larger than most mice so it takes a little getting used to. Comes standard with a dongle which can be paired to other Logitech devices if they have been designed for this feature. You can then slave your keyboard, mouse and other bluetooth items to this single dongle/receiver. Nice to use the mouse, when using a CAD package it allows for easy selection due to high resolution. Some devices with lower resolution seem to jump around when doing fine work.

This is by far the most comfortable mouse I have used to date. The setup was super easy. I have it Bluetoothed to my Macbook Pro, and use the included Unifying Receiver for my PC rig. Switching between the machines is a breeze. I was worried that the Bluetooth side would go through some shenanigans when I switched to it, but this was not the case. Almost immediate switch over.

My only complaint is the loud left and right mouse buttons. Not quite sure why they're so loud, as other Logitech mice don't exhibit this problem. Still, I'm sure I'll get used to it in time…