Without having been subject to the vagaries of USPS, I wonder if it's worth offering both options e.g. UPS and USPS, and the buyer can make the choice.
I agree this would be ideal, but it's not something we can accommodate right now. If we were large enough that we had an office with regular UPS/FedEx/USPS pickups it would be one thing, but offering customers a choice would mean a haphazard schedule of trying to arrange pickups from the various services or driving around town to make various dropoffs and it's not something we can do right now. Maybe in 10-12 months, but not right now, so it's really going to be about picking one service and sticking with it.This would be my preference as well. Some may be willing to pay an additional 5-10% for the more reliable shipping times, but others will be willing to wait the extra few days for delivery. If you were to offer FedEx or UPS, I'd bet that a lot of those customers would even opt for next day delivery.
Thanks for the various well-wishes. We're trying to do better.