We had a very pleasant stay with Guillaume after initial confusion about how to reach his apartment.
MAKE SURE YOU HAVE THE STREET DOOR CODE to get into the building and then take the elevator to the 5th floor. The apt. is the door on the left as you leave the elevator.
This is a comfortable but small room for two people each with a large bag and a carry on.
The apt. is centrally located with LOTS of eating options in the neighborhood.
Enjoy Paris!