Keeps what it promises. It connects instantly to my Huawei Matebook x Pro running Ubuntu 18.04. Sometimes I have to press the BT button on the bottom of the mouse from time to time to reconnect if it doesn't happen automatically. Nice, simple, quality design and feel. It's nice and light and the click is strong enough so you don't keep accidentally pressing it when you put your fingers on it, but it clicks light enough not to strain your fingers after a few hours of use. Center button click is solid and scrolling is very precise. I've been through way too many mice over the past few months, but I'll definitely be keeping this one.