I will compare it to the 4000th model; therefore, it is a step up from this unit; it is unfortunate that they do not create it because it is superior. They covered up the buttons, which was a dumb idea because now you have to relearn how to type with your eyes closed. There are not many keys that can be programmed, and the controls for music and sound are combined into a single block. Backspace The Delete keys are located one on top of the other. Kroch, I'm sorry to say that I'm a little disappointed, but if I had the chance to purchase a brand new 4,000th, I would definitely take it. After putting up a consistent effort for ten years, the buttons were removed. PS: After having been in operation for a month. Absolute insanity when it comes to a keyboard; the buttons are clumped together, the layout is illogical, and it is extremely challenging for the visually impaired to use. In most cases, it's a catastrophe because it has both function keys and a quantity of numbers. I DO NOT Advise Buying This Product at This Time. I have no idea who was responsible for the numerous emoji and buttons that are available in Microsoft Office. Bring back Claudia number 4000, please!