We've booked this apartment because of the early check-in (11h instead of the usual 15h), and we have planned our day depending on this. The problem is that the previous guest was late and due to this, we couldn't take the keys as planned. Therefore we had a problem with communication (unanswered messages and misunderstandings).
Once in the apartment, everything was clean except the table (no big deal, except that we're in a middle of a pandemic)...
All of that is, I guess, a unique problem (and they've already updated the check-in time), and besides it, everything is excellent. The apartment is very well located - a 10' walk from the cathedral and ideal for a family or two couples.