I have been using it for 8 years now. I ate every 2 years. There are 4 in stock. Already used to it and can not imagine how to work for others. PS. The last orders on the market were sad. 2 times a defective keyboard arrived. Curve, with a coating that is centered with waves. Made 2 returns. The last one came with a curved sticker.
I have added some photos to my review to give a more detailed account of my experience.