This is a sweet, very petite apartment. It is in good condition and in a lovely neighbourhood which is worth being a few mins on the tube away from the centre of town for. Nice restaurants , supermarket etc v close and real Paris not just tourist central.
Couple of things to be aware of :
1) it is tiny. You would struggle with 4 adults. We were 1 adult and 2 small kids and totally maxed out at 3n
2) you aren’t realistically going to cook here given the space and facilities . We managed cereal and toast.
3) it is incredibly noisy. It is right on a one way street which seems at first glance quiet enough but the front of the apartment is glass and has zero noise insulation , motorbikes and people sound like they are stood next to your bed and through traffic goes on till past midnight and starts early . The kids were less effected as in the rear bedroom but two people were outside their room chatting and drinking in the courtyard one night and I had to keep the bedroom door closed
4) there is no natural light or ability to have fresh air - small top vent window at the front (which is frosted and curtained to keep cool) and window in the back room but all too noisy to have open . Further emphasises the small nature of the place .
All in all if you’re just a couple looking for a quick stopover and can deal with the noise for a night or so then it’s great as sweet, clean and nice location but longer /more of a base is less suitable.