Location, location, location. Great small place but fantastic location. We spent a lot of time at Palais Garnier and some surrounding places. Galeries Lafayette was a few minutes walk where we could get amazing grocery items. Subway very, very close. The elevator worked the entire time (read some reviews where sometimes it was not functioning, but we had no problems). Bernard was excellent on communicating and answering questions we had about the area.
We will definitely stay there again on our next trip to Paris.