I just popped the DVD in the drive said yes to install and selected the region, about 30 minutes latter I was on line. So for me the first impression was very good from an install perspective.
The Wifi card and Graphics worked straight away without trying to find drivers.
I just popped in my windows live ID when asked, the idea is to use windows live to keep your settings so you can move about on different devices including mobile phones etc running windows 8.
All the security software is preinstalled; I am still trying to check out all the options on this and to see if there is a need for 3rd party apps.
The look and feel is designed for a touch screen and with a bit of hunting around familiar windows options are available.
Preview Windows 8 at http://windows.microsoft.com/en-US/windows-8/preview