Good response time and service; Question - I googled to find the Sears Garage Door repair phone number. During the conversation, I was unsure if this was "Sears" or a "contractor service" or other service. I had to ask if this repair person was coming from "Sears" or an independent repair. I was concerned until the service man arrived in a sears truck wearing Sears apparel. You might want the process to be more clearly identified as Sears.
But the insulation won’t save energy unless you heat the garage or treat your attached garage as part of the “conditioned” part of your house. The federal Energy Star program recommends against doing this if you park cars, store lawn chemicals, or use solvents there because it could let dangerous fumes inside; it’s better to insulate only the shared wall and use that as the indoor-outdoor boundary.
If your door has two springs, most professionals and research online says that replacing both springs is the best option. Most torsion springs are rated for 10,000 close/open cycles. If only one of your springs is broken, both springs are still recommended to be replaced. Considering that your second spring will break soon anyways, this added on fix is only going to cost you about $50 extra to assure that you don't have to pay another service fee for a second visit.