We stayed in this apartment for the month of July. The location is perfect--across the street from the Luxembourg Garden, easy walking to most things in the city center, and good access to restaurants and shopping. The apartment itself is also great and is as pictured and described in the listing. It is on the 3rd floor, has classic Haussmannian style that you hope for in Paris, is very large, gets great light throughout the day (less direct light in the afternoon = cooler temperature in summer), and stayed a relatively nice temperature with a few fans even with 100+ F temperatures outside. The owners were very responsive to our questions during the stay.
There are a few things that the owners can do to improve the experience for future guests. The primary bedroom had stains on the comforter and mattress that looked like blood. These things should be cleaned or replaced. Also, a window pane in the living room had several cracks in it making it very awkward to get air flow without further breaking the window. This should also be repaired. Lastly, we weren't told that we would need to care for the owner's 10+ plants until several days into the stay. This was fine, but was a challenge in 100+ F temperatures and with minimal instructions given. This requirement should be communicated in the listing, and specific instructions should be written down in the house's guide book.
Overall, this is a fantastic apartment in a prime location for a short or long-term stay in Paris. We highly recommend it to anyone looking for a large 4-bedroom space in the center of Paris.