You for got to mention that there are some drawback about keyboard button.

First the Fn (Function key) is too far away from the majority of the combination buttons.
If you set f1-f12 as f1-f12 keys. (not as special hot keys)
it's nearly impossible to freely adjust screen brightness with just one hand
and I think it's impossible to press frequently used buttons "Home" and "End" with one hand.

Suggestion for Lenovo on this issue:
you should move Fn key to the left of the Right-Alt button.
on that spot every Fn combinations can be easily pressed with just one hand.

And also for someone who sometimes need key pad I should mentioned that there is no NumLock on s300 keyboard (which is not unusual) thus make users unable to press combinations that require numpad. (Example of brand who make NumLock is Asus.)