Guillaume is a kind and responsive host! You will not find a better bang for your buck- especially in Paris! It is a very small studio, and worth noting that it is a pull out couch to sleep on not a bed. If you are two small people it will work, especially if you are spending your time exploring the city/eating out and bringing leftovers home. There is technically a small loft but I don’t think a person could fit there.
Thank you Guillaume!