Martine's place is just as described in the announcement.
We were two and it was a little bit small for us because we were carrying two big cases.
The bed is comfortable, we got fresh towels and the whole house was clean and tidy.
It is not close to the center of Amsterdam, but we bought a metro ticket for the amount of days we were going to be there and we got to the center of the city in 30 minutes.
She is very friendly and so are her kids :)