Will end up similar to how it did with us.
We are already this far, the tiler has initially approved €2000 off the total invoice and left the decision to us whether that's okay or if the floor should be redone. Until now, we hadn't decided; now the tiler supposedly talked to a friend who is an expert and now says that a €1500 discount is the absolute maximum and that we should still pay €500 more. However, he would also remove and redo the entire floor, but then we would of course have to pay the full €2000.
My main concern is the warranty for the other trades like the painter and plumber. Furthermore, I don't believe he can properly redo everything for €2000; the waterproof slurry on the floor needs to be reapplied, the connection tiles in the shower are also crooked at the transition, the baseboards all need to be replaced, and a plumber has to uninstall and reinstall the cabinets, washbasin, and toilet...
So the question is simply who takes responsibility for the warranty on the altered trades?
We would prefer to keep it at the €2000 discount; we have already gotten used to the appearance. What we cannot accept is that he now wants an extra €500.