We had a wonderful time at Guillaume's place! He was very helpful with advice on where to go and eat, and was always quick to respond to any questions we had. Montmarte is known for its hills, but luckily, this apartment is at the bottom and close (5-10 mins) to multiple subway stations, so it was a very walkable area. A quiet, nicely sized place for 2 people, with enough outlets for both of us. Would definitely recommend!