It was very convenient for us to have the possibility to rent a "family room", which is made up of two rooms and both rooms have two beds and a bathroom each. There is an additional door in the hallway so that you could keep the room doors open to have access to both rooms. However, no door stops were provided so it wasn't super easy to keep the doors open. The rooms and bathrooms were very clean. The temperature in the rooms was hot and A/C is not available outside of summer, but we were able to resolve this by opening the windows.
The hotel location is excellent. Lots of restaurants nearby as well as public transportation. We did not have breakfast in the hotel and instead chose to eat at nearby cafes and boulangeries. The decor is funky and fun. We very much appreciated the free mini bar filled with two bottles of water, 1 sparkling water, 1 soda, and 1 apple juice. There are also water, sparking water, sodas, and snacks available in the lobby in the afternoons and evenings, which was a great bonus. You can stop into any astrotel to benefit from this bonus throughout Paris.
Hotel access requires a room key or someone from the front desk will have to let you in. While this is secure, one night someone was waiting to get in and walked in after us. Although we notified the person at the front desk, he brushed us off and didn't take any action. We never felt unsafe, but this seemed to defeat the purpose of the secure entry.