Ars technica published a brilliant review of the upcoming KDE 4.0 (release candidate 2). For tests the KDE 4 RC 2 Live CD image proved by the KDE community was used. The Live CD is based on OpenSUSE and provides easy access to a complete KDE 4 environment.
The writer’s impressions are a little bit skeptical:
My experience with KDE 4 revealed a set of hairy, nasty warts that need to be resolved, but it also shone some light on some impressive improvements. Although I’m skeptical that all of the problems with the release candidate can be fixed in only one month, a rough first release seems a small price to pay for the significant long-term advantages offered by the transition.
Read the whole review: A first look at KDE 4.0 release candidate 2.