anyone used zope

[Timothy Bolz]

Has anyone used zope.  It's a web content manager.  I checked out some of the
web sites powered by zope and they loaded up fast.  From what I've
read it's based on Python with C optimizations.  Tucows has it as one of their
top picks for this month.  
http://www.zope.org/
I'd like to hear form someone who actually used it.  

Tim