Have been using it for the past few days. It does take a bit of getting used to, but I wouldn't go back to using a traditional mouse since getting repetitive strain injury using one for a long time. The Bluetooth connection works seamlessly with my Chrome OS system. If you haven't tried an ergonomic mouse like this before, I'd certainly recommend it. I know it's already helped reduce some of my pain in a short space of time as the position of your hand is natural even though it might not feel so at first.