The Installation process of OpenSuse 11.4 M6 is the same as the Installation process of OpenSuse 11.2 and OpenSuse 11.3 with the exception of that once the Installer boots into the graphical Installer you get a warning message about being about to Install a Beta version, other than that it is the bog standard Installer from previous versions of OpenSuse and even the later versions of Suse Linux.
After using OpenSuse 11.4 M6 for a few minuets it's very stable for a release that is currentlya Developer release that is not ment to be used in a production environment.
Everything works as it should, there are a few bugs that need ironing out. I'm really looking forward to trying the Release Candadate when it is released on Febuary the 10th.
KDE 4.6 RC 2 is very stable for a Release candidate, it still has the odd bug, but KDE 4.4 and 4.5 Final have always had the odd little bug that you don't always get but can popup now and again. KDE 4.6 looks more stylish than the previous versions of KDE 4, the KDE Taskbar has got a little Mac OSX/ Windows 7 style polish to it with more modern looking system tray icons.
I'll do a pretty full review of OpenSuse 11.4 when the Release Candidate(s) are releaed,and I'll do a fullin depth review once OpenSuse 11.4 Final is released.