I stayed here for a month.
The place was in a perfect location - pretty central to the 10th, 11th and the 3rd, which are popular districts. The metro stop Colonel Fabien was only a five minute walk away, and the bus stop was close by as well that could take you to the west side of Paris.
Be aware - particularly if you're American and haven't lived in big city life like NY, that this place is very small in comparison to the States, but it is a very normal kind of apartment as far as Paris goes.
Having said, that I really enjoyed my time here. I didn't spend too much time inside the apartment; this isn't a luxury hotel. If your objective is to do as much Paris exploring as possible, it's a perfect place to place your things here as a base.
The hosts were quite welcoming and every time I reached out to them, they responded within fifteen minutes. Having said that, I'm super low maintenance and probably only contacted them in the first day and the last day of my stay. I had to change my dates a couple times due to my pending French visa and they were very accomodating, and again, they responded within minutes.
I would definitely be staying here again.