I honestly do not think it is the drives at fault.
I think it is more of an electrical engineering error somewhere else in the control panel. Given some of the errors that has arisen, it could possibly be noise related in part and inrush current for other parts. I don't have the MX3660, but give the MX4660 a really good workout every week on our plasma cutter.
I consider it to be an upgrade from the G540 and I really like Gecko drives.
I do think they will sort it out. As for it still being a Beta thing, not really.
I understand the disappointment, but not all of these machines have shown these issues. Its not whether they deliver a perfect machine that never breaks down to every customer every time, but how they take care of the ones that something does happen to.
Like automotive parts, there are a lot of manufacturers involved in all the pieces of the machine to make a complete machine.
They must rely on the QC from those companies for the most part.
I can pretty much guarantee that Tormach does not want to have unhappy customers. What company does?