Ok, I have to say that the KDE guys had made a wonderful work with the graphics and appearance, also it comes with all the goodies that you will expect from KDE. They had made a wonderfull job with all the applications (Okular, gwenview and dolphin) and the new concepts for the desktop are great.

The Bad:
1. Stability: do you fear the blue screen of dead? believe me that is a walk in the park!
Plasma just crashes at every opportunity it has, and I am not even doing some heavy use of the computer, just browsing and may be configuring a plasmoid. Sometimes the crash is so bad that it will completely lock the computer and I will have to do a hard reboot! I did not had such problems with KDE 3.2. Well actually I did once in a while but only with applications but not bringing the whole system down!

2. Memory hug: The system will turn really unresponsive here and there, same deal not heavy computing just a few application’s open and this thing will run to a turtle pase. I have 1gb RAM and AMD 64 athlon 2.5 Mhz (ok starting to get a little bit old but still) so this should not happen, the install was compile specifically for the hardware not by installing ports so what gives?

Features usability:
Here I have mix feelings since I run into the same problem with my previous install of KDE 3.2. I am referring to applets and in this new version plasmoids. They do not work as they should and I am not intending to spend hours on end chasing around trying to get one apple to work properly, a few examples:
Battery monitor: Useless out of the box, kind of puzzles me cause I install also PC-BSD and it worked just fine on first start on that system. (system was slow and crashed too for no reasons, not any better)
Weather monitor: After every logout I will have to reset the whole thing so it will properly get the weather station, pretty annoying. Also this was a major headache because it will crash the entire system once in a while

Other system issues:

Power management: A few things work others don’t, can they get every thing to work and work right on the first try? is it that much to ask?

Sound system: It work ok right away but after a few days running the system it decided to tell me that my sound car did not existed any more and was not usable. Phonon will show it as disable and all the KDE multimedia utilities (Dragon, Kjunk- box, etc) will not work! so I ended expending a few hours trying to figure it out, even upgrading FreeBSD. At the end the card was actually working fine but KDE will say that it was not; I had xmms and it would work no problem!

Dragon: why on earth developers keep producing a myriad of applications intending to replace software that works just fine (Xine in this case) ??
I ended installing xine any way because dragon just sucks

My first experience with Kde (3.2) was great , I had issus here and there but not as bad as this new one. This new 4.2 version still has a long,very long way to go!

I am trying Xfce 4.6 right know and loving it!

Last comment is not intended to start one of those flame wars. Each user is pretty much on his own to find the application of software that best fits his/her needs. Is not that the beauty of open source???