I had a nice time at Sabrina's. The apartment is small, but bigger than others I've seen and staid when in Paris. It has everything one needs for a short stay in the city. It is very close to metro lines, bus lines and relatively close to some main train stations. Being very close to the Opera and the Galleries, the area is surrounded by lots of good restaurants.
Sabrina is a very nice host and she gave me all the instructions I needed and asked for.