Hello Stephen, as I've already explained to you,
the check-in late is an extra-work doing in the evening, so there is a tax from 21:00 pm as the rules wrote on the website that you read before made the reservation.
Also I wrote you about this two times before because you told me that you will be arrive later than 21:00, so I don't understand why you are so surprised and disappointed. ( The one surprised it's me).
Anyway, there were my collegue waitinig for your knews about your arrival because you didn't know exactly at what time you could have come in front of the house and as soon as you tell her your update she was coming from the office and she has arrived in few minutes.
- Air conditioner works very well and I never had problems with any others people.
- About noise, I know that it isn't like in a monastery, but you have to know that you decide to stay in the centre and in the heart of trastevere that is the liveliest area of Rome. The apartment is not even directly on the street.
I'm happy that most of my guests are happy, kind and respectful.