Amazing!!
Very close to the metro, so many delicious restaurants and of course Notre Dame! M&S (groceries) is one block away and there is a laundromat on the way.
Grab some crepes, wine and appetizers from L'Avant Comptoir (1/2 block). Some of the best, cheap food you can get in Paris. Grab a classic French dinner at Le Petite Vatel or Le Bistrot D'Henry for a more romantic dinner (both within 2 blocks near M&S).
You seriously cannot go wrong staying here! The stairs are a bit of a bear, there are 120 from the front door, but it's worth it.