Barbara and Arthur (her son) were just amazing, very nice, generous, and made sure we have everything.
The apt. was very cozy (literally, there is a great heating system who saved us in the freezing days). the apt. is very spacious which made the stay perfect for our small group of guys.
The apt. is about 10-15 min walking from Dam square and the neighborhood is very quiet, clean, and cool.
Next time in Amsterdam i'll stay there for sure, very recommended!