The place is in a very good location, near the Sentier metro station. It is also close to other metro lines and Les Halles train station which makes it ideal to move around Paris. Nearby you have many nice shops and restaurants and the area is very lively (we really liked walking on the Rue Montorguell). It is very centric and you can walk to many popular places in Paris like Pompidou (15min), Hotel de Ville (20') or Notre Dame (30').
The apartment was very clean and had everything we needed like kitchen utensils and also toilet products like shower gel and shampoo. The communication with the host was always very quick and helpful.
The main drawback we found is that the bed was a sofa-bed which wasn't very comfortable and after 5 days our backs were hurting. Another thing we found is that some days the apartment was smelling a lot of tobacco which seemed to come from the toilet ventilation despite there is a prohibition to not smoke, as non smokers it was a bit annoying because some days it was very strong.
I would really recommend it if you are only spending a couple of nights or have a strong back because everything else is good but for long stays I would look into something more comfortable.