The printed output was a mixed bag. The built-in printer couldn't work miracles and do anything to improve the images taken by the camera itself; what I photographed as red ended up looking more like a washed-out pink, and a brilliant blue sky became a muddied and mottled gray.
This camera's one saving grace, however, is that potentially it can recognize images taken by other cameras stored on an SD Card, and print those images, too. (I say "potentially" because in my tests it recognized other cameras' JPEG photos inconsistently--the ability is not a given, so you shouldn't purchase the camera just for that function.) A print of a stored 10-megapixel image showed more detail and far better color reproduction than prints of the Instant Digital Camera's own images. That alone leads me to lay the blame for the Instant Digital Camera's mediocrity on its imager, not on its printer.
The printer here functions similarly to the earlier PoGo. You pop open the LCD back of the camera and slide in a ten-pack of special printer paper. The printer uses Zink, the zero-ink technology Polaroid pioneered (Polaroid's parent company has since spun off Zink into a separate subsidiary). The thermal printhead activates the 100 billion dye crystals embedded in Polaroid's proprietary, glossy photo paper (peel away the back, and your photo becomes a sticker). Sheets of the 2-x-3-inch media are thinner than old Polaroid print paper and contain three layers of primary colors suspended within.
Ultimately, if you covet the instant and fun prints that Zink technology enables, I'd recommend the Polaroid PoGo printer over the Polaroid Instant Digital Camera.