Location is great, but pretty much that's about it. Alex (the host who met us) was great to talk to. He met and checked us in early and gave a thorough introductory brief on Paris sightseeing.
But the apartment itself is not in great shape. There is peeling plaster on the walls. There are issues with water drainage in the bathroom sink. Two of the three days there was no hot water in the shower. At night, it's noisy in the apartment even with windows shut. Overall, it's a good pick from the location perspective and if you aren't sensitive to the inconveniences. But given the price, I personally was expecting a quite bit more.