The place was exactly what I needed, some nice comfy beds close to the Javits Center. The only downsides are it being a third floor walk up, not much the host can do about that, it's just an old building, so make sure you're prepared to walk up and down stairs every day, including with luggage. And the second is that one of the bedrooms is right over 10th avenue and the walls are thin, so it gets pretty noisy. The weirdest noise is you hear a lot of clopping horses in the morning. I think the Central Park carriage horses have their stable nearby, and their hooves clatter on the concrete when they're coming out or going home. Cool if you like horses though.
There is a white noise machine in the street-facing bedroom to help with it, but earplugs might be important for a light sleeper.
On the host side, Allan himself was there to greet me and show me around the place right as soon as I showed up. He responded quick to everything I needed. Great host.