I still have Windows phone 7. I've upgraded to Windows 8, but still use Zune to sync. When doing anything on the Zune Marketplace it takes quite a long time to open anything. The pink bar comes on the middle of the screen and sometimes stays for up to 3-4 minutes. Downloading is quick, as always, but searching and navigating the Marketplace is extremely slow. This is on 2 of my computers that are on Windows 8.