I have a nice love story with Plone. It is like a close friend that becomes a lover in different stages of somebody's life.
I first discovered Plone back in 2003. It was a great love story, I use it as intranet since then and worked in a few projects based on it. But since the end of 2005 I haven't been able to work deeply with it, so I haven't been able to test the newest version (other people from Grupo CPD were in charge of projects related with Plone). I was willing to work with the new version, specially after I met Alan Runyan during Software Libre Conferences that took place in autumn in La Laguna (Tenerife, Canary Islands, Spain. During the last 3 o 4 weeks I've the chance to use it again for a project, this time for a web portal.
Plone has grown up but still keeps in the user layer that mixture of functionality and simplicity I used to love so much, and the power and complexity that have attracted technicians these past 10 years.
I love this wiki way of generating contents that Plone has added to the new version. I'm a wiki fan and Plone can satisfy people like me.
Plone is not just the first and only really robust CMS, useful for big scale projects, it is a really good CMS, useful for medium size projects too.