We had a great time in Maartje's place! The apartment is in a great neighborhood. It's an easy walk to all the best spots in Amsterdam. We walked everywhere during our 5 day stay. The bed was incredibly comfortable, with a beautiful view of the little balcony filled with plants. It looks just like the photos; very cozy, colorful with great sunlight.
The place is very lived in, so if you're looking for something that feels like a hotel or a house that's used just as a rental, this probably isn't for you. We didn't mind, and felt like Amsterdam locals for a few days :)
Maartje was a very responsive and accommodating host. Although we didn't meet her, we met her mom, who was lovely and very kind.
The house guide also has an extensive list of great restaurants and other places of interest in Amsterday.