For those familiar with the Tokyo Hyatts:

Any of them equally convenient from both Narita and Haneda? Mainly no multiple trains each way — single train each way would be preferred.

We have a 28 hour stopover from the US (arriving NRT) for a flight to China (leaving HND) & will probably be just resting with that time / eating at the hotel.

May just book a non Hyatt hotel near Haneda as nothing looks straightforward at first glance.