I have never had a problem with USPS. I always request USPS if I can get it. Usually if the shipper uses UPS, I have to wait MUCH longer because my wife and I both work when UPS delivers. Thus we come home to stickies on the door saying they came, but no package for us. With USPS, it usually fits in our box. If it doesn't, the office is just down the road, not through the mot congested part of Chattanooga as we arrive home at rush hour.