Have you tried windows 8?

Hi i was wondering if anyone here has tried windows 8. I am actually using it on my main system right now and i find that i can never get the "tiles" of the "Metro" design part to actually appear anything other than white. All that shows is a white outlined  box sometimes with text. The normal windows desktop interface works fine. I am curios to know if anyone else is have the same issue. Also if anyone has even downloaded it and how often they use it and what they think.