I may repeat what some others have already mentioned, but it's worth mentioning again!
We arrived a couple hours early and were able to check-in. This was helpful since we had our bags with us. It might not always be an option due to cleaning, but it worked out well for us. The place was clean upon arrival. The photos and directions were just as they were in the listing. It was very easy to find once we exited the subway.
Several subway stops nearby was very helpful since we were visiting different areas of the city. We were here for the NYC marathon. 3 of us were running and 3 were cheering. It's right near the 8 mile mark, so that was easy for the fans. It was also easy for us to take 1 subway to the Staten Island Ferry in Manhattan to get to the start of the marathon.
There were 6 of us and there was plenty of room. Kitchen was fully stocked with dishes, pans etc. There was also plenty of towels and soap for the bathrooms.
We didn't use the backyard, but it is a nice space to have. There were all adults in our group, but it would accommodate families with children as well.
The area has plenty of nice restaurants and shops nearby.
Communication with Jon was easy and he always responded quickly.
I would recommend his place to anyone!