Photo quality is generally very good for the Z915's class. The biggest issue is noise, which is visible in photos viewed at 100 percent at all ISO sensitivities. ISO 100 is the lowest the camera can be manually set to, but the Auto ISO will go as low as ISO 64. But, using Auto means the camera will select sensitivities above ISO 200, which are soft and blurry from noise reduction. In the end it comes down to how you plan to use your photos. If they're only going on the Web, a digital photo frame, or printed at or below 5x7 inches with the occasional 8x10, then the photo quality should suffice.
Colors, while not accurate, are very vivid, which many people--including myself--find pleasing. Occasionally, though, things would look a little too unnatural such as the red flowers and green foliage in the top left photo.