I bought one of these about 3 weeks ago. Unused so far as I'm house sitting and have no where I can set it up. Once I get a place of my own and get it installed, I'll let you know how it goes.
Construction seems solid and it was well packed and arrived without damage. Not sure about the quality of the stepper drivers but I've got a Gecko G540 in case it's needed.
Needless to say there's no documentation to speak off
If you want any info that doesn'y involve me starting it, let me know.