We've gotten them on two different houses...but only on the west-facing windows. And, they REALLY helped keep the heat down in those rooms. Luckily for us, the west-facing windows were are on the side of the house, so we didn't really have to worry about the appearance. But, we wouldn't put them on the entire house because they don't look very good.
We used Lone Star Solar Screens on both houses...they had good prices and service. Hope this helps.