I've had a Sabayon install for a couple of years now, never as a main distro but as something that is intriguing and that I want to keep an eye on.
I looked forward to the 5.0 release but was very frustrated when I couldn't get either version of kde to boot on my machine (booted on wife's laptop). The gnome version booted but didn't install properly, thought I'd have to give up on Sabayon till the next release.
As a last ditch effort, I decided to use a different brand of dvd-rw and burn with brasero instead of k3b. I don't know which was the deciding factor, or the combination of both, but I got the kde 64 version to boot up and was able to install successfully.
So far everything is working great. I just might give this version a try as my main distro and hope I don't do anything to break it like I usually do