This is a difficult review to write as we only stayed one night of 3 paid nights due to the lack of air conditioning in the hotel. A heat wave came through Paris this past week with temperatures reaching 38 degrees C. It was hotter than hot and the room did not lend itself to be comfortable for sleeping or being in day or night. While many locals do not have air conditioning, it is definitely not usual for US tourists. The room was equipped with a single fan, though, but that did not cut the relentless heat.
Staff was more than apologetic and appeared to truly feel bad.
As for the location, the Jeff is located in a nice spot for beginning the day and grabbing a bite to eat. As for the hotel, the feeling is a bit different once you arrive. So, as with all online reviews, read them first. It was an expensive change in itinerary, but well worth the ability to sleep through the night.