We stayed at M Social for 4 days. The room was clean and we had enough space for the two of us. We also received a complimentary bottle of wine, so that was really nice (even though we’re not wine drinkers ourselves). The hotel is also in the middle of the city and really close to a metro terminal, so it’s really easy to travel around Paris.
However, we should note that it is a bit noisy outside due to the construction next door and the walls are a bit thin, so you can hear the neighbours next door if they get a little loud.
The bathroom posed some issues, as we had trouble closing the door, and we could hear water draining from the sink even when the tap was not in use.
Overall, it was still a pleasant experience, and I would still recommend it if the following doesn’t bother you considering you will be in the middle of the city.