Does anyone have experience with heat rejection window tinting? Does it really work as well as advertised?

My factory tint is peeling on my back window, so I'm probably going to have all of my windows redone. I was looking into the heat rejection tint to try and cut down on how hot it gets in the cab. Even with the A/C blowing at 40-50*, you can still feel the heat coming through the side windows in the afternoon. Wanted to get some opinions outside of the testimonials from the vendor's website.