This flat's undoubtedly great location and views hides a couple of issues that travellers need to be aware of.
Firstly, due to the main piazza, it is a very noisy place to stay over the weekend, as mentioned by other reviews. If you stay from Thursday to Saturday nights, you will need good ear plugs.
Secondly the 70+ steps to reach it - one flight of which is especially steep - also include a separate locked gate entrance, 4 flights before you reach the flat. We were only give one set of keys, so there was no way to leave the apartment alone. My wife had to walk down four flights just to let me out - and the same to let me back in again. It's an odd arrangement.
Otherwise you have literally everything on your doorstep and a world of amazing food within 30 seconds walk. If you want to party, I can imagine there are few better spots to be.