We had an excellent stay and I summarise our experience below:
Pros:
1) location is great. A 30 mins walk to the Arc de triomphe and Eiffel Tower. Really close to the metro and shops and restaurants nearby.
2) very clean and cosy.
3) very good value for money in comparison to other apartments in the area.
4) very responsive and accommodating host
Negatives:
1) the neighbours are smokers therefore the smell lingers in the hallways outside the flat. Thankfully there is no smell in the flat.
2) the walls are very thin and you can often hear the neighbours upstairs