Here's mine that I picked up yesterday. Love it.
Does't seem as if it will pick up much dirt. If it does, it'll just wipe of. I've read posts on here backing this claim too.
I prefer it over the Apple leather case, which I exchanged. I also have a Rock transparent case which will be used as a secondary case as the white Silicone suits the white iPhone 6 down to the ground and it feels great in the hand.