How do you decide when an MVP is ready to show to strangers?

I keep relearning the same lesson: the first version I am proud of is usually two or three weeks later than the version I should have shown people. What works for me now is a short checklist. Can a new user finish the one core task without me explaining it? Does it fail gracefully when they do something unexpected? Can I see what they did afterwards? If those three are true, I ship it to a small group even if the design is rough. Where do you draw the line between too early and too late?