Our stay at this apartment was very nice. The location can't be beat and is only steps away from the Metro station. We came into Gare du Nord station and had a quick 4-stop trip to the Air B&B. Check in was easy, although there was not too much explaining the ins/outs of the place, as the owner was not able to be there - and someone else was there to let us in.
The apartment was clean and very obviously recently updated. All needed amenities for a longer stay were there (fridge/freeze), pots/pans, washing machine, oven/microwave, etc, cable TV). A nice big table was in the main room that had plenty of room for our family of 5- with some room to spare. The Wifi was strong even with 5 devices going at once - no issues there at all.
The only thing that I would warn people about is the loud music that is played in the evening (2 out of our 3 night that we were there). It went on until a bit past midnight - probably from a restaurant or bar near by. It was barely noticeable in the back room but the room front rooms were a bit louder - particularly the room with the sleeper sofa. HOWEVER, a white noise phone app/sleep machine or earplugs can help with that small inconvenience. I think this is important to note if you have smaller kids or like to go to sleep early...just come prepared and you will be fine. This is most likely a situation you will find yourself in within most central parts of the city just due to the older buildings and the location of apartments over many establishments.
All in all the Air B&B was great and we will absolutely stay here again the next time we need an extended stay in Paris.