The fronts are lighter than the rest of the car. If someone is sitting in the back seat, you can barely tell that there is someone there if the sun is shining directly in the window.
i got 15% up front and i have to roll my windows down to back outta my driveway. otherwise its all good. 5% on the the other windows. sometimes i forget my windows are tinted and roll them down to be blinded from sunlight lol. i feel like im being watched when i ride in cars without tint