I have laptop two computers on my desktop and, until today, two mice. I paired the MX Master 2S with unifying receivers on both laptops, downloaded the Options software from the Logitech website and had the new mouse working seamlessly on both laptops in a matter of minutes. The mouse itself if wonderful, but the Flow technology is amazing. I can even copy and paste text from one computer to the other. The mouse is very well worth the money, especially when you consider is can take the place of up to three ordinary mice. Bluetooth connectivity is a bit choppy for any mouse I've tried. It's OK but the mice work so much more smoothly with the unifying receivers. I used the receiver from my previous mouse in one laptop and the one the came with this mouse in the other. If you don't have a spare receiver, you'll either need to purchase one or use Bluetooth on the additional systems. The mouse will switch between/among up to three.
UPDATE: After almost two years, this mouse continues to exceed my expectations. I use it all day for work and could not be more pleased with it.