You can walk to the Louvre in 7 minutes and to Notre Dame in 20 minutes. The staff is super friendly and helpful. Room is small but very comfortable with a view of the street. The rain shower is a treat. If you forget to bring a converter for the electrical outlets, they have some at the front desk you can borrow or buy. Breakfast buffet at Crayon Rouge is definitely worth the money.
The cafe next door, L'Imperie, has really good food. And if you come multiple times, they give you big discounts without asking. We tried almost everything on their menu.
We stayed at "fancier" hotels in Paris and were not as happy as when we were at Crayon.
Will definitely stay again.