We stayed for 4 days at Jérémy's place. it was really easy to find. Very close to the Gare du Nord and the metro. 30 minutes walk to the Louvre, and it has lots of restaurants, cafes, supermarkets and bakeries. The flat is small, but if you are going to be out all day, it's perfect.
We had a noisy neighbour the first night, but we talked with them and solved the issue. The whole building has Airbnbs flats, so be aware that other people might have different needs and the walls don't cover the noise.
Overall it's a nice place, perfect for small trips to Paris.