They are a custardy tropical and subtropical dessert fruit. Flavor is "the Paw Paw has been described as a soft blend of banana, melon, vanilla, and pineapple". It seems that they can be grown in most of the US (Zones 5-9).
The small tree has tropical-looking leaves, likes damp but not swampy soil.
Several places sell saplings online.
Like figs, people are often surprised that they can be grown easily in New England.