Had a great stay in July 2022. Here are a few highlights:
Guest support:
My flight was late and Leon couldn't meet me at the place to provide a key. He very kindly recorded a video to show me where to find the keys myself and sent it to me. Went perfectly. I didn't see Leon during the entire stay, although we did work it out so he could stop by to pick up one of his laptops (stored in a locked closet) while I was out.
Location:
As advertised, Leon's place is not in Centraal station area/city center, it's a short 15m tram ride + 7m walk from the local tram station. When I thought about it, I realized that while it's not in city center, it takes me at least 15-20m from Centraal to reach anywhere I've stayed in city center. Might as well have more space and spend less money with the same travel time.
The condo
The place was immaculate, beautifully designed and decorated, and Leon left good coffee in the automatic espresso machine (thank goodness!) and beers in the fridge.
Cleanliness etc:
The house, linens, etc had clearly been cleaned prior to my arrival.
Leon asks that you not have parties or make noise. This is understandable as the area is very family oriented and with everyone's windows open outside during summer, partying on his patio would be annoying to a lot of the neighbors above and around in the building.

Pro tip: if it's hot in summer and you have to leave the windows open, you may want to bring earplugs. There is a playground immediately below the apartment and it's adjacent to a primary school where children play on a large field. I don't mind the sound of children playing but for anyone who wants to sleep in, this could be an issue without the plugs.
Overall Leon was an awesome host and I would stay at his place again if the opportunity came up.