I hate to rain on the parade here with all of the sticker love, but I did this on a cheap keyboard for protools about 1 year and a half or so back. The stickers came off after a week or two of regular use. (I may have had an old batch..I don't know) I did super glue them back on and they have stayed however the sticker corners have now rolled up and it makes typing a PITA as your finger get caught on the edges. . I highly recommend the X1 keyboard. They quality is fantastic and it's just a beautiful addition to a studio setup.

Ive got these stickers and they seem great.  No problems with them coming off.  I do think the trick is, make sure you clean the keyboard first.  Would highly recommend these.

DanHab
Ive got these stickers and they seem great.  No problems with them coming off.  I do think the trick is, make sure you clean the keyboard first.  Would highly recommend these.

 
My trick is to have 2 keyboards: one with stickers and one without.  The stickers make typing awkward and the colours are distracting.

Like jac, I put my X1 set over a clear keyboard skin so I can easily remove or change in future.  After about a year of moderate use a couple of the stickers got a little loosy goosy, but they also had some help from my desktop assistant who thought they would be a good chew toy.  Otherwise, I like 'em, especially the economical solution they present. I made myself learn the new shortcuts after verifying or changing the shortcut settings to match the stickers.
Best,
HeyDan