I actually stopped using my Moshi keyboard cover from about a week ago and instead am using keyboard stickers from
Keyshorts. The main reason I've used keyboard covers is to stop the keys from degrading and turning shiny, though they also protect from accidental spills nicely.
After using the same type of keyboard covers for four years I thought I'd try something different. I've always liked Apple's white keyboards, preferring them to the black, so gave a white set of keyboard stickers a try.
They look pretty nice overall and give my rMB a unique feel, I think, and will provide protection for the keys. Additionally, using these has eliminated the key marks that the keyboard covers caused, which is nice.
I'm not sure for how long I'll keep using them, but for now they're nice. Some photos of them installed are below.