I haven't used Windows 8 yet, but I have read many, many of the pundits talking about it. This may be the funniest paragraph I've read on it yet:

I think it’s pretty clear that the Windows 8 bet is failing. Windows 8 is being pre-installed on a lot of PCs, but that’s because Microsoft is pushing it through the OEMs. Microsoft could ship a hamster wrapped in duct tape, label it Windows, and a lot of OEMs would bundle it.

The rest of the post is good too - albeit more serious :)