Funny, I have been using W8 for about 3 months now and have no problems. My computer even got faster. I am in a software company and I chose the small stick and got to install W8 to see if everything is kosher.
I found it very intuitive to use, need to open a program you do not have to go back to desktop just press windows button on the keyboard, still not there just start typing the name of the program you need.
The windows that hide in the corners do bug out every once in a while but I think it is because I am using 2 monitors..
What I don´t like are the "apps" now many are not ripe enough and I prefer the desktop programs but different strokes and so on.