For this price is set OK, but unfortunately has weaknesses.
I bought 2 of these sets and both have the same weaknesses.
POSITIVE (keyboard): Attractive design, good ergonomics (slightly curved keypad and anti-slip coating on the wrist rest), stable processing.
POSITIVE (mouse): Attractive design, good ergonomics (is very comfortable to hold and has a non-slip coating side, stable processing, power-off when the USB transmitter module is parked in the mouse.
NEGATIVE (keyboard): 1) The labeling of the "F" keys in blue can be seen only with very good lighting.
2) the light comes from the side, identifies the key shines so much that they can not be seen.
Negative (Mouse): 1) The mouse buttons are not sufficiently de-bounced. Who has a shaky finger immediately triggers a double. Something usually occurs only in cheap sets. Which keys are processed in the mouse could I sometimes not notice because you can not seem to break down the mouse - at least I have not found a Sraube the mouse to disassemble without destroying.
2) The scroll wheel has no tactile detent. That's not wirkilich negative but maybe some getting used to.
The set will work without installing the software, but it will be remembered each time Windows update because the software is not installed.
Conclusion: Successful design and ergonomics, but unfortunately with weaknesses which I know only from With Cheap Sets forth.
Addendum Feb. 2014:
Unfortunately only 2 stars.
After 2 years, the rubberized palm rest and the rubber feet of the keyboard to solve.
After 1 1/2 years the palm rest started to become sticky because began to dissolve the rubber.
Now, after 2 years, the rubber feet have become on the bottom of the keyboard almost liquid and stick tight as a gum on the table top and the palmrest sticks like a rolled tape.