In terms of location you really are in an excellent position here. There is no noise from the street but you are just a (very) short walk from the main square. The apartment is simple but clean and when you visit a city like this you generally just want a good base from which to explore which this does very well. I think a nice touch would be to have a personal file with recommendations or even a guest book so that people can leave tips for future guests.
The keys are all very straightforward to use and the communication before the trip was excellent. Key handover was also very easy which given we had a nearly 6 hour travel delay was a relief!
As a side comment, please be aware of unscrupulous taxi drivers! Our nearly 90 year old parents were charged £30 for a 1 mile taxi ride.