A few months ago I had a garden window and a new slider patio door replaced. the window and slider faced full west and the old door frame had warped and was leaking. The house was only 5 years old! Milgard would do nothing about the "melted" doorframe and because I lived in the Puget Sound area -- but more than two miles from the sea -- they still would not do anything and quoted the one year warranty. The seals had broken and the glass was all scratched from the previous owner's dogs.
I had priced out replacements and was looking at 4-6K but most products from the local home improvement stores only came with a 2 year warranty. I had the Penguin reps come in and yes they spent quite some time going over the product with me. The price was higher than I had originally thought it would be, but here are the pros for me:
1) the triple panes would cut the glare and i wouldn't have to have blinds to cut out the full west sun's heat and light.
2) I live on a road at the back and 3 panes might cut the noise.
3) it is hot in the summer and cold in the winter in my family room.
All three pro's were realized. the noise from the street is abated, the sun and light shines fully in but the heat does not, the glare from the windows which block my TV is gone. I don't have to have ugly blinds to cover up the beautiful windows. the door is now straight and I can have a screen again. I had the door etched with square grids and they are beautiful. The products are solid and I think worth every penny. I had three windows/doors on the back of my house where the sun is. Initially I just replaced the door and garden window. A couple of months later I had the third one done and I'm already saving to do another window. The sales reps are great and have worked with me to do one at a time as I can afford. I will eventually replace all the windows. As I've seen in other comments, you get what you pay for. For me, the three panes of glass adds so much more. The installations crews are excellent; I'd do it all again
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