I've been using it for 11 years now. The right key has recently begun to suffer from failure. It is treated by replacing the relay with the ability to handle a soldering iron. I advise you to buy a set of legs for the future. The mouse is extremely reliable. Opening for maintenance is inconvenient. The bolts are closed with legs and the legs, after peeling off, already lose their adhesion from the adhesive side. It will be easier to drill holes in the legs