I installed it on two machines last night. I actually don't see what all the fuss is about in terms of people being afraid of it. It is actually quite slick and the ability to flip back and forth between the Metro UI and standard desktop is nice. In desktop mode it is almost exactly like Win7 but looks a little different and doesn't have a Start button. So I just installed a free Start button that acts just like the Win7 one from here:
http://www.iobit.com/iobitstartmenu8.php
All in all I'd say it's a pretty good upgrade for the price. It even seems to run a little quicker and it freed up a bunch of space on my system drive.