We spent four very nice days at Williamsville. Both Arlette and Brian took care of us very kindly and made us feel comfortable. The space is very clean and nice furnished, close to bus and metro stations and to all kinds of shops and restaurants. It is perfect for two persons, it might although be a little small for a family with grown up children. Otherwise it's New York and you'd rather walk around and discover things more then spending much time at home!
So, all in all, we would definitely recommend Williamsville :-)