If you're looking to explore Amsterdam but still have a nice, cozy, quiet place to return to in the evening, Frans' airbnb should be at the top of your list.
The space itself is very modern and stylish. While not a huge house, it is definitely a good pick for two people. The back of the living room opens up to the river/canal, where many ducks/swans would greet us in the morning (my wife loved that).
The bedroom was very comfortable. Good size bed, desk area, and plenty of closet space for keeping your clothes. The bathroom had a nice shower, and I'm fairly certain the floors have some sort of heating in them (though I did not check with Frans, it felt like it though).
My only very very slight quibble is that it is a little bit of a hike to central Amsterdam. About a 15 minute walk to the tram, then usually 20 minutes on the tram into Amsterdam. However, it is extremely easy and cheap. I think an Uber is about 12-15 Euro from Frans' house to the main part of Amsterdam. Plus, Frans has bikes to use if you want to bike into town instead.
The house was stocked with champagne, beer, some soda, and nice local snacks for us as well. Frans also gave us a ride to and from the airport, which was awesome!
Overall, I would definitely stay at Frans' again. It's a great way to experience Amsterdam, and Frans does everything he can to make you feel right at home.