We had a very pleasant stay at Happy Stay Paris for a couple of days. The appartment is in a nice neighborhood with lots of restaurants, bars, supermarkets and bakeries nearby. The location was easy to reach from the airport (CDG) but it was also perfect as a starting point to all the main attractions in Paris.
The appartement itself was very clean and cozy - we had everything we needed. There is not much daylight but that was ok for us.
All in all we had a very good experience with the appartment and the host.