Download via kies only but all dead easy to do. It does reset some aspects though like homescreens, extra email accounts, notifications etc.

I figured a few on here would be interested – feel free to ignore if not 🙂

I downloaded it earlier. Face unlock is a bit of a gimmick, bit the overall experience is great, much slicker than the previous version

I put a modded version on a montecarlo a week or so ago – not quite fully functional but everything I need is fine

battery life is incredibly better than before, probably doubled