We have been spending with my sister 4 days at Arthur's flat. It is really well located (there are a lot of bars nearby, the Pantheon and other attractions are only some blocks far from there) and the room is so nice. We only saw Arthur once but he was so kind replying all my questions by WhatsApp.
Remember that the flat is in a 5th floor without elevator, so it could be hard to achieve it with big luggages.
I recommend it for going some days!