I still haven't figured out what the "perfect" angle would be, but the rule I've heard is 40% sky

I also really like the angle of the Rexing cameras.

Another small improvement is they made the wires with right angles so they look cleaner when installed

It doesn't take much space as it is slightly curved on the bottom and it stick to the windshield which puts it out of the drivers vision while having a great angle for recording

ProsCamera was well packagedPackaging included all necessary mounting hardware, plus a handy tool for hiding the wiresPicture quality without any adjustments (right out of the box) was decent enoughFairly easy to install, basically a "plug and play" cameraVery easy to figure out button use, well configuredEasy to navigate menusBoth cameras have nice physical rotation/adjustment optionsConsCameras were both set to 1080P resolution right out of the box, but the front camera seems to have some trouble adjusting to bright lights, and goes grey/pixellatedPlacement of the Memory Card slot is abysmal - the power cord included is at a right angle, so the base of the cord gets in the way of the slot and makes insertion/removal difficult

You should lay the wires out as you expect it to be installed before you actually run them

Easy instant, and looks are not to bad as it is not very notable.