I was using a laptop with an external monitor and the keyboard was the laptop. This meant that I had my head positioned to one side all day while I spent most of my time looking. My chiroprator visits started to increase, so I ditched the 20" monitor, got a sweet new 25" monitor and this keyboard and moved the laptop off my desk. Now my body is positioned good for hours of software development work.
Why I'm happy:
1) Hate cords, love wireless where it makes sense
2) Love the feature that allows you to recharge your keyboard from USB. I've gone a month without recharging
3) Love the backlit keyboard that senses when your hands are near. I prefer a dark lit room to work in.
4) Love that the front edge slants nicely into your table top, so you don't need a wrist pad.