As I spilled a glass of orange juice on my old macbook, I thought that for the next I would take a key protection, and I would avoid this accident from happening again. Protection is fine enough, we can clearly see through the keyboard backlight and makes good. It takes pretty much the keyboard, she married the keys to the edge of the entire keyboard. It almost makes you forget if we did not feel that the keys are a tad harder to press, but I quibble. It will soon be a year since I have and I do not regret to have it! The dust goes under the keys, I just remove the protection and pass a sponge occasionally, it remains always clean. The negative points I have noticed, however: It's been a few days I noticed that the protection was slightly yellowed space between the key and trackpad, I think AC should be had to heat the mac product. Also with this protection on the keyboard, you have to occasionally clean the screen because this one leaves traces unsightly but easily go with a microfiber cloth and the right product for the screen. Unfortunately, I dropped a few drops of Fanta on my mac, fortunately I had the protection, and when the latter shook worn, I would resume the same.