[Cadaverous Pallor]

From our own experience with the sliding glass door, the double paned, UV blocking glass made a HUGE, noticeable difference in our kitchen temp. And that's even with another large window in that room that we haven't touched. That said, it would be tough to say the cost is worth it. We only did it because our door died and needed replacement anyway.

In reading some reviews it seems the Gila stuff may be a bit annoying to apply as it's an adhesive, but it does a better job blocking heat than Energy Film, which is a cling. Some of the reviews say plainly that the Energy Film does not work...