Orson's department is amazing, very stylish and comfortable, i would definitely return and recommend it to my people.
Very clean and tidy, spacious and cosy. It has everything to spend a beautiful stay in Paris.
It is on a 4th floor (by stairs) in a nice passage. The neighbourhood is very quiet, ideally to rest happily all the night.
Do not hesitate in going to Orson's :) You will not regret.