My girlfriend and I just returned to the US from Paris and Claude's Airbnb is great. Would definitely stay again.
First off, Claude is a great host. He asked what time we would be arriving at the address, and he was waiting there for us at the front door. He helped us bring the luggage up the stairs and inside, and showed us around the place and answered all questions for us. He was also very quick to respond when we had questions.
Second, the location is great. You pop out the front door and you are immediately close to all sorts of food options, bars, cafe's etc... Walk around the corner and down the block and you are on a main street with easy access to taxis if you need, and a close walk to the Metro. Very busy and fun area too especially if you like nightlife. Seemed to be a very safe area as well.
Lastly, the apartment is very clean and tidy. Wifi works great, shower was nice and had hot water, and the bed was very comfortable. My girlfriends cousin came to stay with us for a few days as well and the pull out couch worked perfect for her.
The only possible downsides (and these really didn't matter to us at all) is that the apartment is on the 4th floor and its all stairs so someone who is elderly or with a disability might have a hard time. Also there is no window in the bedroom, so if it is a hot night it could be uncomfortable, although there is a fan you can use. There are large windows you can open in the bathroom and common area and those do get good airflow.
Overall, great place and would stay there again if/when I return to Paris.