I tested the Win10 Demo yesterday after getting a refund on the full game a month ago as i got always CTD, soundlag issues, infinite loading screens etc with the full game. So i will monitor this game for a few months and hope we get some more patches in. Demo was running good (just occasional stutters during races but nothing annoying. menus lag though, thats annoying. But did not have CTD or infinitey loading, seems the latest nvidia driver did something good for memory leaks... But i have to say: After playing GT Sport for a while now, that lighting in Forza is really weak in comparison. Proper HDR is really a game changer. I did not want to believe this until i saw it myself.