IES tinted two sliders and 5 windows. One of the windows was in our garage and boy did it cut the temperature in there. They use Vista window film rather than 3M. When I told Saul (the owner) that I heard 3M was the best, he said that Vista is the best and that he could use 3M, but chose to use Vista instead. Vista's website is:
www.vista-films.com .
On three windows that get afternoon or morning sun we used the next-to-the-darkest tint (V18, which is 20% light transmitted), in the kitchen we used a lighter tint to let in more light (V38, 37% light transmitted) and on the sliders we used a medium tint (V28 which is 28% light transmitted). It does cut down on some of the light, but not so much that you miss it. I guess you could say it cuts out the bright glare. Sunshine still comes in the windows and is still as cheerful, but you don't feel any heat. All together it cost $825. The cost is calculated by the size of the windows/sliders, and it doesn't cost more for a lighter or darker tint.
You can't tell there is tint on the windows until you go outside! We already can feel the difference in the mid-day temp in our home, and the a/c doesn't run as much. We consider the window tinting one of the best decisions we've made for our new home. IES has a website, too:
www.ieswindowfilms.com .