We stayed here on our first visit to Paris and loved it. We were looking to be outside of the touristy areas and this was perfect. It was easy walking to restaurants, shops and the Eiffel Tower. The terrace is an absolute dream and the jazz cds + stereo really set the vibe. I highly recommend staying here! I would absolutely stay here again.
We were here in July and weren't bothered that there wasn't AC. The black out shutters really help with the heat! Only bummer is that you only get one key but I think that is pretty standard for Air BnBs so just coordinate with your people and you'll be good.