I have been running Win8 on 3 of my home computers since last December. I actually went with Win8 because it was on promotion for $40, far less expensive than Win7. I has been stable, fast and fully featured. Functionally, I find Win8 no less useful or capable than Win7, and in many ways much better.
I do not have touch screens, so I installed Classic Shell, as noted above. Once that is done Win8 functions and works just like Win7, except faster.
People are freaking out because they don't like the Metro screen. It is one click to dismiss it and return to your desktop. People are freaking because there is no start button. It is easy to put that back. People are freaking because their documents don't open in the programs they expect, that is as simple as changing your file associations (picture open in adobe instead of "photo app").