Keep your eye on it...pay attention to it...treat it nice and you'll get good parts. Neglect one of the three and it grabs a knife from the kitchen and starts chasing you around the house.
Keeping up with bird nests, insert changes, tool wear and checking part measurements is a full time job in itself.
Most people I know think cnc machines are easy to setup, run, program, maintain, operate and design models for. Depending on what you are doing it can be far from it. And many times the faster you want it done the more attention it requires. Or you end up with a wtf just happened and the dog runs out of the shop.
I Also want to vent about how much time I spend cleaning up my shop. I need an industrial Roomba