have 25% tints on side windows and using AWRA Curtains as well. The car remains cool and use AC on 1 even in noon when the temperature is at peak. Don't go for shades. It makes difficult at night to see through them. Curtains are better as you can slide them back when not needed easily. Also, the shades get stuck in window when you roll them up. I know all this because I have been using shades for quite some time. Recently I installed curtains and it's an amazing experience.