The location is amazing - it's right in the center of the old town, all the major sights and dozens of nice restaurants and cafes are in walking distance, metro to the airport takes about 45 minutes. The internet is super fast (200 Mbit/s down, 100 Mbit/s upload). Clean, well equipped, very comfortable bed.
There's a little street noise but it's not too bad. The only problem are the street musicians. Most of them are pretty good and with closed windows no issue at all. But there was this old dude that came 6 times during my 2 week stay. He always sits right in front of the window and blasts his terrible music, sometimes for hours. Always the same songs and he really can't sing. So that is a bit annoying if you are trying to work from the apartment, but if you come as a tourist and can just leave then that shouldn't be an issue.
Still overall a fantastic Airbnb, highly recommended