Cannot recommend staying here enough if you're interested in seeing the museum / scenic side of Amsterdam. The apartment is 30 seconds away from the museum quarter and supermarket and within 5 minutes you can walk to Vondelpark or the starting point for all the boat tours.
Once you don't mind the stairs, the apartment itself is sparkling clean (minus the dog hairs, but he was so cute it didn't bother me at least!) with two balconies and a hammock if you'd like to relax. There was no shortage of clean sheets and towels either and plenty of room in the kitchen for your own supplies.
Finally, I found Dina-Perla to be an outstanding host, warm and personable who went above and beyond to make my stay as comfortable as possible. No amount of questions were too much for her and her encyclopedic knowledge of the city definitely helped me get the most out of my stay.
Will definitely return here on my next visit!