Hey Matt,
the lack of inputs and the strange behaviour of “estop” (loosing all position and offset values) is really annoying. That’s also one of the reasons why I’m not planning to use this controller for my machine (neither the Masso because it is proprietary, closed-source). On Buildbotics and its Onefinity derivate, you don’t even have an input for a program pause when someone opens the door of the enclosure, and you don’t have the capability for the program to continue smartly when the door is closed again.
I however think that the price-performance ratio is excellent on the Onefinity Controller. It is a stand-alone CNC controller and has the stepper drivers included (unlike the Masso, that needs separate stepper drivers or stepper motors with integrated drivers) and it supports Modbus protocol over RS-485 serial communication that not only allows to set spindle rpm exactly but also reports VFD speed setting back (unlike the Masso which is not capable of Modbus protocol).