It's a very small, simple apartment, real six floor walkup. But the location is great, subway a block away, it's only 30 minutes walking to Notre Damn, 8 minutes to Gare d'est 15 mins to Gare du Nord. Host didn't provide sheets when I booked, was a bit of a pain to bring my own, but was a on short trip so it worked out. Make sure you get the door code from him, as he forgot to provide it to me ahead of time. Bed was comfortable, nice shower.
A good budget option in a great location though!