The keyboard is hard and is laid on the table, even when typing quickly it does not slip. The arrangement of the insert and delete key is at the bottom in my opinion even better than standard keyboards. Optical defects I could not find. Otherwise, other users said applies: The bottom row of buttons requires carefully targeted meetings and is not for the big fingers, but the letter keys are of normal size. Significant processing deficiency are different pressure points of individual keys. The "N" is vague, with no tactile feedback and a little heavier than normal as the other keys (the letter is but as it should), the bottom row again feels different than the rest. The Little Match prediction I will keep the part but as it is. For the price and "Made in China" one may well expect consistent quality. Sometime after heavy soiling the keys are already deducted times and made a thorough cleaning; in this old-fashioned technique that should work in decades. Perhaps then the speck of dust to be found under the "N".
Update this review on 18 March: For frequently used buttons to the label replaces. This may possibly happen after 10 years (if ever), but not after 2 months. Stay away from the part.