Photo Cube’s two biggest selling points are its small size and simplified user experience. As compared with most printers, this one’s only 6.9” wide by 5.9” deep by 3.8” tall—that’s not exactly a cube, but it’s a smaller footprint than either iPad. An even bigger contrast with other printers: it only has one button, an illuminated power toggle on the top. Once Photo Cube is removed from its package,…