the company is easy to work with

This is a doggie door that is unsurpassed by any other brand. I have owned two other dog doors by two different companies, the kinds that are sold in chain pet stores or the big box stores. Both leaked air from day one (or at least within a few weeks). Yes, this is expensive comparatively but if you live in colder climes, you have to keep down on loss of warm air. This door does not lose warm air (other than by convection similar to windows and walls).

I suppose if you live in a very warm climate, this door might not save you that much energy costs. But, it is more than a energy saver.

It’s well made, the company is easy to work with. (They recently addressed an issue I had because we have two large dogs that rush almost simultaneously out the door, wreaking a bit of a strain on the sealing flap. The company has come up with a solution.)