I haven't had mine for very long, but when I first got it I couldn't machine anything without horrible vibrations. Luckily, all it turned out to be was the gib strip on the x axis had a real low spot. Once I sanded it down flat, vibrations went away, so everything is good now. As far as the accuracy, I'm still lacking a few essential measuring tools, so I won't be able to check for a while. I'm also researching some of the different cad cam programs, so I won't be cutting parts by way of cnc for a few more weeks. It may be a while, but I'll post back as soon as I do.