As much as I like my Smoothstepper and will continue to use it, there are still a lot of "quirks" to the firmware. I'm not trying to cast stones here, but it is simply not a complete product as far as the software goes. I could give a toss about backlash comp, although that is currently not complete. My main issue is things like when I hit STOP, even after hitting a FEED HOLD and letting the machine come to a stop, I get an awesome pop up that says the SS ran out of data during a move, and has to be restarted, saying that "hopefully this will be handled better in the future". Mach now has to be restarted and I need to redo my offsets. I'm sure there are other surprises to find out as well.
Again, I like mine, and I'll continue to use it. The developer still says it's in beta, so it's not like I feel mislead. I just think that people who are considering it should understand that it isn't all roses just yet.