I just installed the latest RC version for evaluation. Here's my rundown:
1.) Hardware detection sucks. Didn't detect my monitor or mouse correctly.
2.) You don't get any software other than standard KDE desktop apps. No Apache, MySQL, etc.
3.) Other than the writing the installer (not very user-friendly, I might add) they didn't do anything, but compiled some software packages for 686 and put them together.
4.) Hard to tell if the speed is really that much improved, could be very subjective.
5.) $98 for the final version seems very steep. You don't get your money's worth compared to other commercial distros.