Stayed here as a family of four (two adults, two kids) and it was perfect for us. The house was exactly as shown in the photos, and everything was clean and worked well. An excellent location being so close to the RER stations, and having the Jardin du Luxembourg on the doorstep was great too.
It's true as others have suggested that you can hear when there's a train passing by, but it didn't trouble us at all or keep anyone awake.
Patricia was in regular contact, providing all the information we needed and responding quickly to any questions we had. Would certainly consider staying here again in future.