Plus:
The studio is at perfect location. You can walk to the famous places of Paris.
The metro to visit Paris and go to the airports is close to the studio (5 mins walk).
Pierre is a great host. He is very helpful, responsive, punctual and polite.
The studio is well-equipped and suitable for two persons.
Minus:
The smell of the studio at the beginning was not good.
The lavabo and bathroom got stuck.
Otherwise, the studio is very good. I highly recommend if you want to visit Paris.