This is a great place. Katja's listing and instructions were very clear and accurate. *Hint - make sure to read all of the house rules and notes - important tips there that make everything smooth. For example, I saw a note that there are no big grocery stores right near the apartment (a bunch of small convenience stores all around though). I like particular things for breakfast, so I snagged them from a large super market on the way from the airport before checking in. Big win for convenience.
Transportation to/from any destination in Manhattan was a breeze (takes just under 50 leisurely minutes to any location).
We had a couple of on-the-spot requests that Katja happily fulfilled. She and her husband answered our door knocks with kind attention, which left us with a good impression because we knocked twice outside of business hours (times you'd never want to call someone). Very warm and welcoming people and place - made our vacation very comfortable.