Charles's place as many have said is fine for a quick stop. It's just a few subway stops from JFK and it's a quiet cul-de-sac location. The place is very minimalist and would really benefit from more furniture to make it more comfortable, although there's a kitchen it's quite under equipped. The place is massive and has loads of potential and is one of the cheapest places you'll find like it in New York.
We visited during a storm and the heating was wiped out, which while inconvenient, Charles was responsive with telling us about the issue, otherwise the place was lovely and warm for wintry New York.
As said, if you want a quick cheap place to see you for a few days this place is fine, the beds are okay and all the facilities work which is the main thing. With additional furniture and a few adjustments this place will be excellent.