There are many good things about this accomodation! It's located next to Gare du Nord and walking distance from many nice bars and restaurants. The place itself is quite big having 3 rooms, each with their own bathroom and toilet. Alex was a good host, we were able to store our baggage at his restaurant while we waited for the check-in time (he also offered us complementary drinks).
However, being in a basement we weren't able to open te windows and the place seemed pretty worn down.
It's definitely fine for a short trip with friends who are out and about in Paris!