I enjoyed a month-long stay at this apartment.
The location is a good mix of "in the middle of things" and "off to the side a bit," and the neighborhood is lively and pleasant. There are multiple fruit stands, restaurants, boulangeries, fromageries, and every other kind of "erie" within easy walking distance -- you really don't ever need to leave your street for everything you could ever need in terms of food. A walk to the Louvre or the Notre Dame area only takes 20 minutes, and you're steps away from some of the main drags of Paris. Bikes and scooters are plentiful.
The apartment itself is quite small, as described, but quite charming and tidy. The window in the bedroom looks out over classic Parisian rooftops to the east, and provides a good vantage point for the street below. Amenities-wise, they've done a ton with the space provided, squeezing in a sink, stove, coffee machine, oven, washing machine, iron and board, etc. Apart from consumables, you really won't need to buy anything for your stay, no matter how long it is. They also provided toiletries that lasted 30 days for me.
Because of the size, it _is_ possible to start feeling a little "hunched over" after a bit of time in the apartment. There's always a slight chance you'll bump your head against a beam or edge, especially in the bedroom. I found it charming, but it's worth knowing that taller people will really feel their height in this place.
The desk and chair provided were more than adequate, and the wifi signal was quite strong and steady -- capable of video calls, streaming media, etc.
Overall, I recommend this place, and I will have fond memories of the time I spent there!