Despite its size, this studio has everything you need (although you might have to search around for it a bit). I even made my own dinners there without issue. Great option for a solo traveler. Audrey was wonderful, gave easy instructions and made check-in very simple. The studio is also in an awesome location, only a 10 minute walk from Sacre Coeur!
As I stayed there for a week, I do have a few things that you might want to keep in mind:
1) Wifi code does not have dashes or spaces in it (the label has dashes in it from what I remember, but to get it to work you should input it without dashes or spaces)
2) If you can (as in, if it's not too hot or cold outside), keep the window open when you're in there as the room gets easily stuffy
3) Elevators are unreliable and break down often. If you're on the elevator and it breaks down, there's a turnable handle on each floor that, if turned, will unlock and open the door to the floor for you. I would suggest taking the stairs whenever you can, though (it's on the 7th floor, so it might be a hassle but getting stuck on a tiny elevator is no fun)
4) The toilet situation isn't the best and you will need to bring a) your key and b) toilet paper (she provides you with a roll) with you each time, but the window at least has a nice view of the city
5) The towel rack falls down easily, so be careful when pulling on the towel
6) You might want a sound machine/app for sleeping as the walls are pretty thin and the city noises can be loud at times
7) To get out of the building, you have to click the "porte" button on the wall for the front door to unlock
Food/drink (non-touristy) recommendations nearby:
1) Breakfast/Coffee - Cafe Chez ta Soeur. Just about two steps outside of the apartment. Cafe with great breakfast/brunch options. Slightly on the pricier side but has some good combo options that are decently priced. Dessert there is really tasty.
2) Dinner - Cafe Francoeur: nice waiters, very English-friendly, bustling area, good prices/good food. I went there a couple of times and though it wasn't an exceptional quality of food, I had great experiences with the servers and service.
3) Dinner - Le Sarment de Montemartre. Good happy hour options and the food is tasty. I honestly just had a burger and fries there but there is a lot to choose from.
4) Bar - Le Supercoin: HIGHLY suggest going here. The bartender I spoke with was really awesome and there are great beer options to choose from. However - if you buy less than 15 euros worth of drinks you'll have to pay cash, 15+ they allow credit card.
All in all, very worth the stay. I had a great time and if I find myself solo travelling in Paris again, will definitely seek out this studio.