I've really enjoyed using the Adesso MCK-142Pro Keyboard. The only issue I've encountered is that the lettering on the top of the most used key caps wears off after a few weeks. The manufacturer sent me a full set of replacement key caps as part of the warranty and advised that the only solution to the problem is to apply finger nail polish to each replacement key cap to slow down the wear. I'm disappointed that such an expensive keyboard won't hold up to normal use, and that there is not a better remedy.