I recently stayed at this hotel and it's location is probably it's best feature. It is very close to an entrance to the metro (if you come out the wrong exit you are on the complete other side of the Madeleine) and you can walk to all the big attractions (louvre, Eiffel Tower, musee d'orsay, arc de triumphe).
The room was small, but this was expected. My parents had a room with a balcony, but it was too filthy for them to use - it was not cleaned during their 4 day stay.
We also placed a do not disturb sign on our door every day, but every day someone either knocked or simply came uni our room when we were not there. One day we quickly went back to the room to pick up a forgotten item and found someone looking in our fridge to see if we had used (an astonishly marked up) drink or snack.
My parents had also got some mail sent to the hotel on their behalf. On enquiring with the after hours person at the front desk if it was there, the person made no effort to look for it and rudely told them they should have checked their room for an envelope. The letter turned out to be at the reception when checked again at 7am the next morning.
Positives were a lovely young lay at reception who was very lovely and helpful and kindly spoke English to us (as did all the staff) in a friendly manner.
Overall, we enjoyed our stay but when paying at much would expect more service and those little things not to happen.