Everything I can think of is perfect

The stabilization is great. Everything gets a crisp border.

Large uniform areas become clean and smooth, with no visible noise.

Huge resolution and tons of detail.

Cortex has real zooming. When you zoom in with the regular Camera, you just get a cropped photo. When you zoom in with Cortex, it exposes and processes for slightly longer, to give you more detail and the same resolution.

File sizes are very reasonable. For my iPod Touch 6, Cortex JPEGs are only about 1.7x the file size of regular photos.

Cortex captures location data just like the built-in Camera. The geotags can be seen in Photos.

For still scenes, Cortex can completely replace the built-in Camera. This is truly one of the best apps Ive ever used.

yarnichat about Cortex Camera, v2.0