they are fun/interesting, we're still "perfecting" them and learning the software. one guy got a machine to just make oval "holes" in boards for gun stocks! (he makes cabinets)
he says it will save him tons of time/which means making money (instead of doing it by hand). and I'm finding out lots of people don't know how to use computers but want a CNC (Computer Numerical Control)! and don't understand software is not cheap and you need it!