Stay at Arthur and his friend was really great. Guys are very cool, I really enjoyed their playing guitar and singing :)). If you're not looking for super calm and luxury place, this is it. It is typical boys flat, the room is small and simple but kind of nice. Accomodation is 10 minutes from montmartre cemitery by walk and not that far to sacre coeur as well, to center it is close by metro with good connection to everything you need to visit in Paris. For young travelers this place is well suited and I'd like to recommend it.