We start of our testing with the most obvious feature used by most people on their smartphone: the camera! The B2C Bookstyle case has a large enough cutout to not hinder the lens of the iPhone 5S
Taking photos outside with/without the case did not show any difference in picture quality, much as expected. Once inside we used the flash and noticed that the light was being reflected of the case cutout onto the lens, creating a washout effect
With the case <--------> Without the Case
With the case <--------> Without the Case
The fix is luckily a 2 second job, take a black marker and color the white finish around the cutout black
The difference is immediately noticeable and the end result is very close to the photo taken without the case:
With the case <--------> Without the Case