What do you think? I tried downloading it but couldn't get Ubuntu to dual boot on my PC. http://www.linuxcnc.org/
Haven't used it yet, but a couple of days ago I read the 300+ pages that were written for it. Let me know how it goes. I like the photo engrave ability, but the rest is a bit too time consuming for my schedule.
Sorry I couldn't be of more help. Don't get me wrong, I haven't heard anything bad about Linux cnc. If you have the time then I say go for it. I run Ubuntu from a 64Gb thumb drive at reboot. I love it!! Has some great drive tools too.