The only issue I've run into is that the old Project Spartan taskbar link was not removed, and now it's a "ghost" icon, and there is no way to remove it... I notice in Jeff's screenshot that he has the same problem.
Right now.. really liking this build. I can pin items to the start menu with no issues.. and as many as I want without having to restart explorer. Edge has a new ICON..
Overall it's a bit snappier and the upgrade went rather fast and easy.
I like it..