Valesca is an excellent host. Had a delay with our flight and arrived to Amsterdam after 1 am and she was absolutely terrific and accommodating.
The apartment is in a nice area. Not central, you still need about 15-20 minutes on the train to get to the centre but that was absolutely fine. There were nice cafes nearby and lovely coffee shop at the corner.
Read carefully the previous reviews on the stairs. They are absolutely horrendous. It didn't bother us that much as we had a small hand luggage but if we had heavy suitcases, I would think again to go there.
Before you travel, check with the host if there are going to be toiletries in the bathroom. We had to buy for ourselves.
But overall we had a really nice stay.