My room was lovely, done in understated beige tones and good-quality furniture. The bed was very comfortable. The room was quiet and squeaky-clean. It is however a very small hotel, so the breakfast room is small and the breakfast itself modest, and you hardly ever see any other guests.
The location looks very central (heart of the medieval town) but in fact it is a little hard to get to by car because of the one-way street system, and by foot it is up a hill from the nearby commercial areas. Still, it isn't far from most downtown institutions or areas that one would care to visit on foot.
There was a billing issue that was presented to me at the last minute. I felt that they should have brought it up the night before when I had explicitly asked to settle my bill in full (and did, or so it seemed) and not the next morning at the very moment I needed to dash for the train station. Still, this sort of thing probably doesn't happen often.
If you want a very high-quality room at a significantly lower price than the older, more-famous hotels downtown, then Les Armures is a good choice. Several well-known personalities seem to have chosen it, too (see the elevator interior).