Arriving almost at midnight two hours later than initially planned, I haven't heard any complaints from the host. The host is very welcoming, friendly and understanding. The apartment location is very nice. A few minutes away from the Notre Dame de Paris. You are unlikely to find another place near this location for that price.
The are a few downsides though. The apartment is really small with one room incorporating the bed, the kitchen and even the shower cabin. Another downside is that the toilet is located outside of the apartment on the same floor. And if you are new to Paris, the thin walls make you hear your neighbors well. But in my opinion the pros outweigh the cons.