This is a "service" where UPS drops your package off at USPS for final delivery. This eliminates the UPS cost of delivery to your door and in theory reduces your shipping cost and that of the seller. I am not convinced that shipping cost to us is always reduced. Here's the issue. My local post office's record of delivery of my mail and packages is mediocre and seems to be falling. Important mail is now sent FedX since USPS has lost several critical pieces this year. Packages using the SurePost "service" have disappeared and USPS local office says that: 1. They never received it from UPS 2. The UPS tracking number generated when dropped off at USPS is not recognized. 3. They have no idea, wait a few days to a week and then file a claim-impossible to do without details from the shipper side. I have never been able to get enough information together to fill out the form. UPS will say that they turned it over to USPS and they have the assigned tracking number, therefore it is out of their hands. Now, UPS is offering for $3.50 an upgrade from SurePost to UPS Ground, this by way of a tracking report I received from UPS. The tracking report says that they cannot provide an estimated delivery "since final delivery is being provided by the U.S. Postal Service." UPS must recognize the poor service from USPS, and besides they can make a few more bucks on USPS mediocrity. I just paid UPS $3.50 to have my new CPU, for my shack computer, from TigerDirect changed to UPS Ground and feel more assured that it will either show up or be traceable. BTW: Tiger provided free shipping on the order, albeit SurePost without my knowledge. I have spoken to others this year, a MT parts supplier for instance, about the low grade USPS service. It does not seem seasonal, no excuses for Christmas, Thanksgiving, Arbor Day.... Just a cautionary tale. It ain't like the ol'days.