I have some stickers on my DXG, but only on the back side. I like to read without the leather cover because it makes the thing too heavy to hold comfortably for a long period (I am a wimp). The problem with using it without a cover is that the back side is slippery and it will slide off of anything you set it on that isn't level.
I ordered some bath-tub non-slip stickers and applied them to the back of the device. It isn't perfect, but it's a lot better. The stickers also make holding the device more secure, too and it still fits into the leather cover just fine.
http://www.rehorst.com/mrehorst/Kind...017_065610.jpg