I've upgraded 3 machines to Kubuntu 7.10 already. I've upgraded all of them using the online method. My gaming desktop was the smoothest. That is also the machine that I've hacked up the least, so that is to be expected. I used adept_manager and upgraded to the RC version of Kubuntu a week before 7.10 was released officially.

My personal laptop was a nightmare while trying to use adept_manager. It was never able to really even start the upgrade process. It kept giving me an error about how some other process must be using the apt database. Which was total crap. I even turned off the auto download of security patches. I had read that some other people that got that error did that and it worked for them. Not for me. Finally after running "sudo dpkg --configure -a", few apt-get clean up commands and a reboot, I did finally get it to work... kinda. The process kept on hanging with adept_manager. Additionally my laptop was confused as to what Ubuntu distro it was (ubuntu, kubuntu, xubuntu). I reinstalled the kde-desktop packages to fix that. Then I finally just gave up and went all command line on its butt.