The studio is super central. Must say 5 stars for the location. Able to walk to Chatelet, St Michel Notredame...metro/bus stations, city martket just 2-10 min nearby. You will enjoy the movement of Paris in every moment.
Melusine is a good host and very detailed person. She cares for any details of the studio and provide you a helpful guide.
A minor note is that there are so many things which are really not neccessary for the stay. If there are removed, there will be more spaces for traveller. And actually, the studio is in 5th floor w/t elevator. For us, that was not a big problem but you should bear it in mind