We stayed at the apartment for 8 nights. Overall it was a pleasant stay.
All the good sides:
1. Location is good. There are metro stations (less than 5 minutes walk), RER station (10 minutes walk) and bus stop(2 minutes walk) nearby. Especially for those who are going to the nord or est station, it's very convenient to go with bus.
2. Stylish as the picture showed. Clean apartment(only a little minus point for some dirty dishes in the dish washer) and comfortable beds.
3. Very easy check-in and check-out as it showed in the instruction.
4. Enough blankets, pillows and towels.
5. Heater and WiFi both work very well.
6. There's a small elevator. It's easier for carrying the luggage.
7. Supermarkets nearby. Shopping area not far away.
As for the downsides:
1. It's an old building so the sound insulation is bad. We could hear the noises of the cars and people outside the street. Even when our neighbors opened their door, we thought someone was breaking into our apartment. But during the night, if you are super super tired then this problem might be solved.
2. We booked the apartment because we want to cook dinner every night. There's a small pan with a shaky handle, a medium pan and a bigger pot without any handle. When we were using the biggest pot we have to use gloves to hold it. Besides, the soup spoon, bowls and plates are most likely in plastic material so we couldn't use it for too hot food. We have to leave the very hot food in the pots to let it cool down instead of putting in the plates or bowls right away but in that case we were out of pots when we were cooking. The two small knives are more suitable for cutting small vegetables and fruit. The cutting boards are small, too. It would be great to have a bigger knife and cutting board. The apartment would be really perfect for us if the cooking tools, plates and bowls were better.