I recently purchase a PowerMac g5 and want to keep the rather posh look Mac keyboard from get dusty , dirty or fill with the occasional cookie crumb . the Protouch XT be fairly overpriced but it do what it be suppose to . of course , dust will stick to the keyboard but it be \* suppose \* to prevent dirt and so on from get into the keyboard . it take some get use to : while the cover will suppress the usual keyboard noise -lrb- which be minimal to begin with -rrb- , you 'll have to get use to typing with a keyboard cover over you key . it seem more apparent with the numpad key . the cover do not get in the way of the usb port on the rear of the keyboard . it simply cover the top as describe . this have so far keep my keyboard dust free . I wash it on occasion with standard dishwashing soap and water .