Until now I've been very impressed with Windows 8 - having graduated all the way from Windows '98 (with a Mac in-between). It's faster (7 took a minute or so to get online, with 8 it's instant) and seems to offer more. But this bungled update is very disappointing and likely to put people off:
http://www.myce.com/news/users-report-problems-with-important-windows-8-update-64819/Leaving many of us with what Microsoft calls a 'vulnerable' operating system. Hopefully they will fix it soon and do further testing before releasing the next shock to our systems.