Bought some of these a while ago, moving table models with the electronics in the legs.
Machines were OK but the software and electronics were total crap.
Did get one working, can't remember what we did for the serial cable but we got a copy of the software off the net, no dongle needed.
Finished up selling the moving table ones and just kept the larger moving gantry model and put this on to Mach3.
been a good machine since then.