UPS has led FedEx in global revenue, satisfaction, and logistics in almost all studies for several years. For consumers in the United States attempting to import/export packages, the single best advice I can give is to learn about the US CBP clearance processes, compliance, and USITC harmonized tariffs. Although FedEx and UPS offer useful brokerage services, you can avoid those fees by completing the clearance process yourself. I should also point out the USPS depends on multimillion dollar contracts with the FedEx, UPS, Delta Air Lines, United Airlines, American Airlines, Kalitta, Hoovestol, Eagle Express, etc. etc. for their domestic transportation, US Mail, Priority Mail, and Priority Mail Express services. USPS's aging infrastructure should make it the last option for any consumer or business. I have consistently found that UPS has far more advanced logistics and tracking technologies as well as skilled Teamsters than any other carrier-- it is for these reasons I pick UPS.