Personal experience only, your mileage may vary. Recently ran a new boat with Zeus in the Pacific Northwest. Bunch of control system alarms popped up and finding a servicing dealer was impossible. Ran the boat despite the "return to port immediately" alarm on the assurance from a C/M dealer in Florida. I wasn't impressed with the dockside maneuvering compared to similar IPS boats I've run. Much more difficult to parallel park and bring the bow around. Overall the system just didn't feel smooth, movements were very jerky and abrupt. IPS was similar when it came out but has become much smoother over the years. Best joystick system I have ever run is the Twin Disc. Traditional shaft drives with proportional hydraulic bow and stern thrusters and since it uses their quick shift transmissions it's crazy smooth when clutching into gear. ZF, zenta, and yacht controller tried to copy the concept but they don't even come close on function.