Staying at Richard and Lisa's place was a great experience. It is located in a less touristy neighborhood, within walking distance of Notre Dame Cathedral and very close to the metro. The apartment overlooks an inner courtyard (no street visibility), so is quiet and private. There are four flights of stairs to climb, but we did so much walking (and stair-climbing) during Paris sightseeing that it didn't really make much difference! The spiral staircase actually adds to the charm of the building. There were a couple of minor maintenance issues that the hosts were unaware of, but when notified Lisa was very apologetic and responsive. Overall, we would definitely consider staying there again next time we are in Paris.