I got a good one: the screen lighting is perfect. I love it! Mostly because of the page-turn buttons.
I like the Amazon cover (not the price, though, but I figured as long as I was spending so much on an e-ink reader, I'd go all out). I got the synthetic one. It has a nice, matte texture, and although it adds some weight to the device, I think it's still less than my PW with cover. The Voyage doesn't really snap into place; it's held in by magnets. When the cover is flipped over, it adheres magnetically to the back and doesn't flop around. Very comfortable to hold. I'm glad I got it, but it should be 15 or 20 dollars cheaper (IMHO)!