Hi Michael,
We are a happy CF user in Aus (installed 4 yrs ago). Our CNC was given the choice between CF and another competitior, (not Optio as it happens) and pointed out that the support required for the competitor was significantly greater than for CF. For example, the whole of NSW has one CF staff member in the state. I get the feeling he isn't rushed off his feet either!
I am a support / BA person. I find that CF is extremely flexible and relatively intuitive. Anyone who has a basic aptitude for computer systems should be able to work with it, and support here is pretty good. We have all modules except the archive. I particularly like Director - very versatile.
Good luck.
Regards - Chris