My friends and I booked Léo's flat on very short notice. Still, Léo was able to welcome us in good conditions and was also super flexible regarding arrival time. That was very important to us. Coïncidentaly we arrived right at the same time as Léo's wife and she greeted us warmly and gave us some recommendations for our stay. Léo did send us a document beforehand with important informations about the Airbnb as well as recommendations on what to do in Den Haag. The location was very nice and around 10min walk from the center.
Allthough we stayed in their attic and there wasn't a lock on the door to the attic, we all felt very safe and at ease. Unfortunately on the first night the heating didn't work so we were quite cold. But Léo was very reactive when I texted him and solved the problem as soon as he could.
The attic had a nice size for the three of us, especially because we were gone most of the time.
All in all I'd recommend Léo's attic!