Everything went smoothly with my wife, but I had gray hairs from time to time. The thing is, she is not an expert, neither am I, but I can spot a crooked tile from 2 meters away, she only sees it when I show it to her.
I don't believe that all construction sites went without problems, not even for —if I remember his kitchen, something was reversed. But it depends on how you deal with it; if you recognize a problem, you fix it and don't make it worse than necessary. We had someone here who fought for a permit for 5 years... For what, just to be right? I've also had craftsmen who botched their work; I kicked them off the property—things nearly got physical. Anyway, they'll never see that money, and I'll fix it when I get the chance.