Hotel Monterosa is in a good location, tidy and staff were kind. In my experience the hotel was not very soundproof which meant you could hear the dining hall downstairs (I was on the second floor), as well the doors of other rooms slam - even with earplugs I couldn't get a full sleep - which made it feel more like a dorm than a private hotel room. Overall, it is decent value for money given how expensive Paris is, but I still think you should be able to get a more peaceful sleep.