Totally agree with this. When we replaced ours a couple years back, I didn't notice much difference in the bills either. But man, the comfort factor w...

I've noticed the visibility thing too, especially when applying those reflective films. On cloudy days, I always end up missing a bubble or two and on...

Totally agree about the shims. Learned that one the hard way when I skipped them on a basement window—seemed fine at first, but after a couple winters...