The mouse is ergonomic and comfortable. But the laser sensor has trouble on my granite countertop. It often freezes and studders. It requires some sort of mouse pad. It can be as simple as a piece of paper. Once a pad is placed over the granite it works fine. But my older HP wired mouse had no difficulty with the granite counter.
It doesn't stay paired with my laptop. I have to pair it again and again and without a button to start pairing, it is a pain to use it, so I put it away.