The check-in was person-less which means you simply did not meet anyone while checking in. This is great during the pandemic obviously and it's great since you are not limited to check in timing. On another hand it ran out smoothly and Marta did explain everything well.
The flat is really central, really close to Sao Bento station and you won't need public transport at all to explore the city :)..
So overall: price, location, cleanliness are all top!