Guillaume's place is very conveniently located next to Luxembourg gardens and about an equal walk from the Saint Placide and Saint Sulpice metro stops. The floors, while perhaps not original, are certainly vintage and you'll get plenty of creaking from the floorboards, so don't worry about anyone sneaking up on you! The flat is very large for Paris and could accommodate a larger group than ours (we had 4) comfortably. The flat was clean and check-in was a snap thanks to good communication from Guillaume. We had a great time and would certainly stay again when we return to Paris!