Nice little 1-room apartment set on a really pretty, quiet and safe cobbled street with an amazing location. Just around the corner are lots of restaurants, bars and shops and it is about 1 minute away from a very-well connected metro station, and easy walking distance to the river, Notre Dame etc. It took us no more than about 20 minutes to get anywhere we wanted to go in Paris.
The place itself is basic but in general we hardly spent any time there apart from sleeping, and it has everything you need for a short stay.
Axel is a fantastic and very friendly host, and was there to meet us when we arrived and show us around, and was always very quick to respond to our questions.
In terms of value for money in a central Paris location, you really can't beat this place. Highly recommended.