I already have the grown-up edition of this, the MX Keys full-size, as my daily driver. I bought the Mini as a couch/lap keyboard for PC gaming in the lounge, which it excels at.
The good: excellent bluetooth range, backlighting is wonderful, great key action (feels nice to type on!), solid weight (not plastic-feeling at all). Can pair with up to three different BT devices.
The bad? Despite being recognised by a PS5, this keyboard is not supported by Sony's console, so you're out of luck if you want to use this for CoD K+M action. Also, the wireless tech in this keyboard is different to the MX Anywhere 3 (which I also bought), so if you want to connect this to an Xbox Series X (as I've done), you will need TWO dongles (the Bolt, and the Unifying). Way to go, Logitech.
As this was primarily for PC gaming, it fits my purposes, but YMMV if you want it for console gaming. Overall, wonderful device let down by some weird compatibility for Bluetooth and weird design decisions for bridging (receivers) for non-BT devices.