This apartment is as described/pictured (perhaps a bit bigger than we expected, in fact) and in a stellar location; we loved our neighborhood and walked to excellent cafes, boulangeries, etc., and to many quintessential Paris sites as well. The bedroom was cozy, and the fold-out couch exceeded expectations for comfort and ingenuity. Bathroom and kitchen: clean, stylish and functional, as described/pictured. All in all, we would stay here again.
Do expect noise at night from a local restaurant (think crashing dishes at irregular intervals) - if you're a light sleeper and arrive during a hot spell requiring open windows, as we did, bring your earplugs. Also, as it's a 17th century building (and beautifully so), the stairs require vigilance to navigate, esp. if you are schlepping luggage or are tired from walking all day in Paris.
Expect additional house rules and insights into navigating Paris/the neighborhood/the apartment's amenities upon arrival.
Hosts were available by text quite easily throughout our stay: good support!