We had an great experience with Regis’ apartment.
Location is excellent, both for walking to Paris historical Center or to wander around in the bars and restaurants which are nearby.
The flat is very spacious, we were very comfortable with a family of 5 (with 3 teenagers), with many amenities. It looks as one in which a family live, if you prefer the sterile appearance of a rental unit this might be less of your style. But the size and comfort (and location) are in my mind way more critical.
Highly recommended.