Overall impression: Score 2+

Just typing and fast browsing and easy to read at a keyboard. Bigger letters with contrasting numbers make the operation of the keyboard is very pleasant.
I highly recommend this keyboard, am really pleasantly surprised, lighter pressure point and optimum size of the buttons. Write liquid is guaranteed, without ever accidentally get two keys simultaneously. I am not yet a senior and only wear a lightweight reading glasses on the computer, but it's just more fun with this keyboard work.
For seniors, this keyboard is a real relief determined because the ratio is black / yellow really easily perceived by the slightly larger letters. In dark rooms, these properties of the yellow keys help greatly with big black letters.
The quality of the product I was seen in the central area, you can go wrong with the price of 12.90 euros nothing. I have found no significant errors, except perhaps the spacebar, this is somewhat loosely attached and makes when typing, how should I say a clicking sound for loose plastic, if at all, this would be regarded as a shortcoming.
I can live with it but me and was the keyboard at any time to buy back, as the other advantages of this keyboard severe consequence.
USB port is running with me on Windows. 7
Positives:
+ Cheap price
+ Very good size keys and easily readable black letters
+ Good, pleasant stop with slight resistance
+ No shiny surface
+ LED lights in green pleasant
+ Stable positioning on the desk
+ No plastic odor perceptible
+ Fast Shipping
+ Postage of 1.95 euros

Minus:
- Spacebar makes noises (Plastic Sound)

Overall impression: Score 2+