Personally, I love Windows 8.
It does take some getting used to, but it's pretty akin to when they hid the control panel options behind the new control panel in XP and again in 7. It's really not worth it if you already have 7, because the performance increases aren't that much different, but I will say 8 boots in a flash compared even to 7.
I'd say, if you're upgrading from XP, do it, if you have 7, maybe hold off unless you like fancy new things like I do.