Sorry for the late reply. No issues with runout whatsoever. Can't say whether that's by luck or if it's a precision spindle. I don't cut a lot of wood. Most of what I cut has been 1/8 and 1/4 inch acrylic. I have plenty of things to be concerned about with acrylic, like melted acrylic on my cutter, but runout hasn't been an issue I've had to battle.

Many of the things I make are "press fit" designs. For things to press fit correctly, the accuracy needs to be pretty good. I haven't had any issues.