Eden's apartment is a lovely space – perhaps one of the most tasteful I've seen in Paris – not far from the Montparnasse train station. It's very spacious and can easily accommodate 4 individuals (or up to 7 people if you're willing to share a bed), just as the listing says. Moreover, it's on the ground floor, so no need to worry about carrying your luggage up multiple flights of stairs.
The only thing to be cautious of is the apartment's lack of A/C (which was quite surprising for me given the price). Fortunately, I stayed at the apartment in the fall, when the weather in Paris is relatively cool, so opening the windows when it felt warm and/or stuffy in the unit sufficed for me. I might reconsider staying here in the summer, when temperatures in Paris can reach the upper 30s.