I stayed in Matthia's place for 1 week end enjoyed it very much. Great location in Santo Spirito with MANY great cafes, restaurants, sights in walking distance. Great internet connection that allowed me to work remotely. The communication with Mattia was easy and I appreciated his flexibility when I extended my stay for 1 day. THANKS!
There are just two things inherent to the apartment that made my stay "only" ALMOST perfect - but there is little Mattia can do about it:
1) The noise from the air conditioning (?) from the restaurant kitchen below was a bit disturbing for me, especially during evenings.
2) When I used the water there was a smell of gas or so that is probably because the pipe system is old.
In any case the apartment is amazing and I recommend you to stay there!