Yesterday, I put up the insulated curtain panels in the office portion of my L shaped enclosed porch. Unfortunately, I miscalculated and needed many more so I returned to Home Depot just as they were about to close, purchasing the last pkg they had. I still needed 2 more. So, I went on line, and sure enough, they have them, in stock and will deliver for free in 3-5 days, saving me a trip or more back to the store for the additional curtain panels. Nice perk.