First I have to say that David's apartment is an amazing place and I would stay here again if I return to NYC and recommend it to anyone else.
We were a party of 3: myself, my sister and a friend. And there are only 2 points that I will describe at the end that would need improvement to make any guest feeling better while staying here.

David was always very helpful and replied quickly to any query and gave us the best information he could to prepare our trip. He was very flexible with the check out time allowing us to return keys by 2 pm because of our evening flight.

On the positive side of the apartment itself is that everything is as described and shown in airbnb with all the facilities we could need on site. The beds where very comfortable, even the sofa bed that I used it myself, although I have to say that for 2 persons I would have found it small, but was perfect and comfy for 1. Heating was great during the cold days of December; and kitchen and bathroom were also nice with everything working ok. We had some issues with the internet as 2 cell phones were never able to connect the wifi, but worked properly with other cell phone, 2 ipads or a macbook (what was the problem with those cell phones I don't know).

The location is great with easy access to anywhere in Manhattan, with a subway station only 5 minutes walk away so as a supermarket to buy anything we could need for our breakfast.

The neighborhood is quiet and very safe. No noises at all in the apartment or the building so we had perfect rest every night of our 7 days holiday.

The 2 points that I would suggest David to improve are next. They are some details that will make anyone's stay here more lovely and comfortable:
1. We found the cleaning to be only superficial. Apparently was everything clean, but down the sofas, over the shelves... (I mean, behind the scenes) you could notice that more cleaning would be desirable. But it didn't bothered us too much.
2. We found that David could have made more room for our personal things, as wardrobes and cupboards were mostly filled with David's belongings and we found difficulties to store our clothes and purchases. This is something that David can improve without big efforts, so this is my advice.

All in all, I will not hesitate to book again this apartment and recommend it to friends or airbnb community. I thank again David for having done our stay in NY so memorable.