The Galaxy C9 Pro (SM-C9000) features the same camera configuration as the A5 (2017) and Galaxy A7 (2017), all of them have a front and rear camera with 16-megapixel resolution and a very fast f/1.9 aperture lens. It's great to have a high-performing main camera, but not everyday we get to have a front-facing selfie camera that can perform as the main camera. I personally think that a single rotating camera would be a better design, like the Oppo N1, which was the first phone in the world to feature a rotating camera. Maybe Oppo has patent on it, I really don't know.
Anyways, it would be amazing to be able to capture very high quality selfie photos and view them on this fabulous 6-inch display.
An F1.9 aperture isn't the fastest out there, but it's certainly a very fast one, especially for a front-facing camera. This means that you'll be able to shoot better pictures in poor lighting conditions. This is not less important for the selfie camera. How many of you wanted to capture a selfie image in a relatively dark place but couldn't get a good quality selfie because of the poor lighting conditions? I assume that many people have this issue.