Good place, very well located with respect to Gare du Luxembourg and the European area. If you stay for a short stay it's perfect, otherwise it suffers the usual Airbnb apartment syndrome: white walls, minimal decoration, set of Ikea furniture, etc... Not super cozy but overall fine.
Additional fun fact about the toilets: you can check out the neighboring roof tops through the big untainted window while releasing yourself. A bit unsettling at first but quite an experience.