Really great location: just off Blvd Haussmann, and within walking distance of several boulangeries, restaurants, stores, and Grand Magasins.
Great staff (who dealt with a room booking issues quickly and without fuss).
Note: the elevator is not for the claustrophobic!
Only downside was the poor sound insulation: lack of double glazing meant street noise couldn't be ignored and thin walls/interconnecting doors meant that noisy guests caused a couple of interupted nights' sleep...