First time I've ever heard of it.
They need to use bigger motors due to the direct drive rack and pinion. Not the best way to drive a machine.Powerful steppers
V-Rollers are not the most rigid motion system. Even less so when the rollers are plastic.really good/ strong mechanical build.
The fact that the standard spindle is a dremel tells you that it's a very lightweight machine.
A high quality machine with good components is going to cost money. When your goal is to offer the cheapest machine possible, then corners have to be cut.