SUPER BEAUTY, really. Of course it is a habit, but when I tested the Lenovo and Apple keyboards in the store felt they were actually not as good.
Sometimes lags the keyboard, but it's probably my motherboard's fault because the same thing happens with my corded mouse. I have been playing FPS with no problems, I want to emphasize, and it has only occurred when I wrote.
Just make sure you actually sit where there is plenty of light, otherwise complain battery! The battery could however never end for me, but just became low, and you can always put it near a window when not in use.
The design is cruel sleek and slim. There is probably not much more to add ... I am extremely happy with my copy and have had it for over 2 years now, with minimal problems. Some keys got stuck a little over a period, but has long worked flawlessly! Nice with 3 year warranty as well.
EDIT: Problem with the keys came back and got worse. So I decided to call the support, and after a short process promised me a new keyboard. It came within a week if I remember correctly, that design-wise different but functionally as bright Nordic K750. Seedhead warranty issue, in other words!