The hotel is very well situated in the middle of the 8th Arrondissement, within a walking distance of Opera, Place de Madeleine, Arc de Triomphe, Louvre, etc. The street is very quiet, so while you are in the hearth of Paris, there is as minimal outside noise as can be achieved given the location.
Personnel of the hotel provided excellent service (in very good English), offering help all the time, answering our questions and being very welcoming in general.
The rooms (we occupied a double and a good-sized single) were VERY spacious for central Paris.
Concortel is not cheap, but for a longer than a weekend stay, the room size makes all the difference.
The small downsides are the decor that was somewhat dated in both rooms, and the lack of sound isolation in-between the rooms and floors.
We chose not to take the hotel breakfast as there are plenty of cafes around the hotel.