Really lovely apartment and perfect location. Welcome from Viero was great with map and info.
However, we found communication from Alain to be a bit rude and abrupt and he tried to charge us 20euros cash on our arrival at 8 despite this not being mentioned anywhere on the listing when booking using the mobile app! So make sure to check that your arrival time is acceptable before booking to avoid hidden costs!
Also we had no hot water either day. Viero did fix it on our last morning just before we left but then got annoyed when we were a little late due to my boyfriend having a shower. The cleaner actually came in whilst he was getting dressed and started cleaning which he was quite upset about.
I would recommend the apartment for the view of the Duomo alone and the lovely little outdoor table, just be aware to communicate well before booking.