I have, I use a Graphtech fc7000, 8000, and 8600 at work. I'm pretty familiar with adjusting settings for the blade depth and pressure, and adjusting speed as needed. I'm sure the LP3 will probably be a little more finicky and temperamental than these much more expensive machines, but that won't be a problem for me and I'm willing to put in the time to get it dialed in. I just want some decent tracking length, and having the contour cut option down the road will be a big benefit, and this machine offers both at a very reasonable price.