We stayed here for a full month. The biggest plus to this place is without doubt the location. Apartment is located in a fantastic location in close proximity to everything. It is in the 1st arrondisement which alone tells you it is located in the center of Paris. There were lots of restaurants, shops, and supermarkets around so it was very convenient. Montorgueil St is located within 5 minute walk and has loads of bakeries, fresh fruit and vegetable stands, cheese shops, butcher shops, and everything you would need food wise. There are multiple fantastic bakeries around, my favorite being Bo & Mie which had delicious croissants, desserts and breads. We went to 3 different bakeries every morning depending on what we felt like having. There are plenty of cheap eats around (mostly Asian restaurants) which was great.
We traveled all through Paris and also went to the Palace of Versailles, and only needed to take the Metro a few times. We walked virtually everywhere since it is so centrally located.
The apartment is as described. It was very clean but a bit sparse. The only negative is the LOUD NOISE EVERY NIGHT. Because of restaurants and bars all around and it being on a narrow street, the sound gets trapped. People hang out in the bars and on the street until 2-4 am every morning. To be fair, if you shut all of the windows and the door between the bedroom and the rest of the apartment, it blocks out the noise in the bedroom. But then the place gets stuffy. This would be fine in the cold months but especially during the warm months (we were there in Sept and it was still warm), you need to get the air circulating. He does provide 2 fans -- one for the bedroom and one for the living room which help a lot. There is a window in the bedroom but when you open it, the stale smells from the restaurant come through so it isn't really doable. If you are used to city life and noise, this place is fine but know thyself.
There is no oven in the apartment, and limited cookware. For short stays, this apartment is ideal. The windows in the living room let in a lot of light so it is very pleasant and pretty. Overall, I was still pretty happy with this place but beware of the noise.