Great location! Only a 15 minute walk to the Louvre and accompanying museums. The neighborhood itself has a lot of good food and is very close to the Pompidou. Right above a pastry shop so you can easily grab breakfast before you head out for the day.
The space is the perfect size for a couple. However, I would echo what others have said, there are a lot of stairs up to the unit and it is narrow. My wife and I had two full backpacks and a carry-on and were fine but large checked luggage may be tough depending on your health.
Would definitely stay here again!