This flat is in a great location - close to bars/restaurants/metro but very quiet once you're in the flat. And the host's communication was excellent, and she was flexible in allowing us to drop bags early. Kitchen also very well equipped.
However it is not spacious if there are a few of you - there was 6 of us. Only one toilet for that many people, and sound carried between rooms. Very little natural light or ventilation. Also beds/pillows are hard, which won't be to everyone's taste. If you're planning on spending much time in your accommodation in Paris, it's likely to be cramped. As a base to go all over the city, it's great.