When we got to the "annex building", we were not less than shocked by the difference between the boutique hotel and this annex building which has nothing to do with Hotel statement, but more than a building of rooms. In addition, the room has a glass door directly to the street (used to be an office I believe in the past) where my wife and two kids were afraid all night. If this kind of building was pictured and presented on hotels.com website (which is not, for a good reason) as the "Annex building" no way I would reserve it, definitely not for 183 euro, as I was willing to pay this amount to stay in the unique hotel above the river. When you order a room you also pay for the location and uniqueness of a hotel as should be with a "Boutique" one.
When we reached the hotel reception and claimed the building, the answer was that the hotel is fully booked and there is nothing they can do about it.
I personally think that this is not something I can refer as a fair business and standing behind a statement that it was stated in the reservation itself...
Also,hotels.com did not take responsibility for this misleading (as it appears in their website) and was rejected any request for compensation for the fact that the hotel is not willing to do so. Not less than a bad joke. Stay away !!