I've had one for 3 years.....its a tank and works well. Not sure what your looking for in respects to feedback. Keep it clean, gaskets need replacing once a year...cant really complain.
Not an owner, but I work on several Cimbalis. They are solid machines that make good espresso. Parts cost are a bit (in some cases a lot) higher than average. Make sure you have a local service tech that stocks stuff for Cimbali - since some parts can be hard to get in some areas.
I'd replace group gaskets at least every 6 months, and depending on use you'll probably want to rebuild steam valves at least once a year.
Unless its a new machine, don't touch the manual fill valve.