Having a pc- less machine would be a big plus. My 3d printer is quite capable with whatever internal processor the thing works on. I've purchased so many used pc's it's kind of sad. Mach3 has been quite useful over the years but I think I'm ready for something that can be more reliable that what I'm currently dealing with. The Xcontroller works really well for what it is and I like the plug and play aspect. Still, there's a laptop connected up to it. The dust and cold winter temps kills them off. Nothing is worse than a toolpath that goes awry on a costly chunk of wood.