I've got an original Belkin N52 sitting on my shelf hardly used... well I did use it for awhile but found it very limiting as far as buttons go. Don't get me wrong I'm not a clicker and keybind everything essential. I make full use of my keyboard and it just felt like I was gimping myself by using that product, plus having to move off of it and back to the keyboard to type was incredibly annoying. I think I need to actually see a video of someone using this thing effectively to appreciate it...