|The Desktop with some Notifications|
The first thing I notice is that KDE 4.5 does, in fact, work. Yay! (A word of warning to anyone who wants to install KDE on top of another DE: do not use KDM, as it will cause problems.)
|The Cube effect|
Desktop effects work well, and I now believe that KWin is pretty darn close to feature-parity with Compiz. KWin also has a side-by-side window tiling effect (that some people say was taken from Windows 7). Also, activities are now much more useful because one need not zoom out anymore to manipulate activities — the button to manipulate activities is in the "cashew" upper-right menu.
|Firefox and OpenOffice.org tiled side-by-side|
|A bunch of Plasmoids (widgets)|
With GNOME 3.0 looking to experience the same issues as KDE 4.0, KDE 4.5 is a very easy-to-use, feature-filled, stable, and fun experience. I would recommend it for anyone who wants some more shiny toys on the desktop (because GNOME looks a little too simple); it's even available to try on Microsoft Windows and Mac OS X. I'll probably be using this for a while anyway.