EZ Snap sunshades seem to help

I've recently added EZ Snap sunshades to all the windows of my 2016 , Itasca Navion 24G, except for the windshield where I use a Fancher cover. I put a piece of Reflectix between the Fancher windshield cover and the windshield. I just got back from a trip to Lake Havasu where the daytime highs were in the mid 90's and the A/C kept the interior in the low 70's. Before the sunshades and windshield cover I was lucky to get the interior temps more than about 10 degrees lower than the outside temps. So far I think the EZ Snap covers were well worth the roughly $300 cost.