A small but very well-organized apartment in the middle of Paris, 5 minutes away from the Seine and Isle St. Louis, but itself on a calm street. Had a great stay here, without any problems or incidents. The interior is very well-kept and the place is moreover well-decorated.
The co-host Alice was moreover very friendly and helpful, and even met me up at the train station when I arrived (she lived nearby). Even though I didn't need any help with anything I felt assured that she was ready to assist if anything would go wrong.
Would recommend this to couples or single travelers who want to be in the middle of Paris.