Joomla Upgrade
I have upgraded from Joomla 1.5 to Joomla 1.7. The process was painful and there is still a lot of work to do. I hope that the Joomla team makes the next upgrade easier. Still, the improvements are nice and I like Joomla a lot. I don't have a lot of experience with other content managers so I cannot "compare" them, but Joomla has worked well for me so far (other than the horrific upgrade experience).