Five starts sums it! Petra was very nice, providing simple directions, being there to explain how everything worked and giving us tips to enjoy Amsterdam.
The apartment was absolutely amazing! Great view, the quietest place on earth with a garden table to enjoy it. The only sound you can hear at night is the canal waters moving very slowly, you couldn't really ask to be more comfortable and with a tram right there to get you in 15 minutes to the life of Amsterdam, which requires no introductions.
Another nice detail about the apartment is the heated floor... It was always a relief to be able to take your shoes off at the end of the night and relax in your warm home like refuge.
I will surely come back to this house.