To me, Ruben is the ideal host: professional, easy to communicate with, and accommodating (within reason). For example, my wife and I arrived earlier than expected and didn't want to schlep around the city with our luggage - Ruben graciously allowed us to check in early and drop off our things.
The room itself is small, but perfect for a couple. I wish the weather was nicer so we could have enjoyed the spacious garden patio! The location is optimal as well - steps away from the #4 tram line and a short walk to the Metro, Albert Cuypmarkt, and all the great restaurants in de Pijp. We will definitely make a return trip to Amsterdam and I hope we'll have the chance to stay with Ruben again.