Pretty hard to fault our stay at Ben's apartment. Spotlessly clean; meticulously and cleverly fitted out; brilliantly located; and quite atmospheric as well as you gaze down on the surrounding streets, and across to your Parisian neighbours.
The only shortcomings, as previously noted, would be the climb up the stairs (not really an issue unless very young, very old, or infirm), and the fact that the apartment is quite small. But as noted above, clever layout and fittings overcome this to a large degree.
We had the good fortune to meet Ben and his delightful family, and they were more than helpful in supplying us with 'local knowledge' on restaurants, bakeries, supermarkets etc.
For up to 4 people (2 couples or family), highly recommended ...