Location - fantastic. 40m from the Metro, next door to Hotel des Invalides, easy walking distance to the Eiffel Tower, Place de la Concorde, etc. Pretty room (no. 2, Leonardo de Vinci), good size, breakfast included, OK so far.
The building has very clearly been converted from a family home to a hotel. There was an arch between what is now rooms 1 & 2, and only a very thin party wall (more a membrane) put in, such that it's very clear which TV channel is playing in each, and the conversations being had (not every word but some), thus not quiet until gone 23:00. The breakfast had a cold selection of meats and fish, etc. (very nice) and supposedly hot food too (Bacon, scrambled egg or tomatoes). The 1st morning, everything was cold (egg and bacon). The second, the tomatoes were warm and the eggs were still cold. Also, we saw 3 mice scurrying through the doorway to hide under the dresser on which the food was placed. One even went back again and behind my wife's chair - not really what you want in a breakfast room (or when you're only wearing slippers). Staff, especially reception excellent. All in all, pleasant without being quite what I'd hoped for, for my wife's birthday, or for €750 for 2 people, 2 nights. Yes I know it's Paris, but....