I type A LOT - all day, everyday. And I have been told I have "heavy fingers". I routinely wear out the letters on my keyboard and have to replace it every year just because of the letters being worn off. So I was very happy to find this solution rather than trying to guess at which key is which. I have had the first set on for two months with no signs of wear - the stickers are all in place as they were on the first day no visible wear to the print. Adn to know I have backup sets, just in case, is even better!