Product review (5 stars): IT WORKS!!
Just LOVE it!  I have an old apartment with an old kitchen - nothing is level or even (oh, well). I've had the plastic and the metal versions, neither of which worked very well in this un-level, uneven environment. They were always in motion and the metal scratched my stove.

This is the solution! It self-adheres, so it never, ever jiggles or moves, but is easy to remove for cleaning. I just peel it off. It's virtually clear so it doesn't clash with anything. I've had it only for a month, but so far so good.  I've run my oven as high as 500 F without a burn or melt problem. I can't attest to its ability to resist staining, but so far no problem. And, it does its job - no more food mess dribbling down the sides of my stove or counter. I highly recommend it.
UPDATE: 5/27/16
I first purchased this December 21, 2014, and still love it! It hasn't stained, but it has discolored. No biggie, it is the kitchen afterall.  Still adheres and does the job.  I just purchased another one for my Dad!