It's funny that all three major carriers have already been called both the best and the worst in this thread, and we're only 21 posts into it. 
Personally, I don't like USPS. Their tracking technology is at least 10 years behind the other carriers, and their employees are uniformly lazy and rude. I'm indifferent between Fedex and UPS; never had any serious problems with either.
Personally, I don't like USPS. Their tracking technology is at least 10 years behind the other carriers, and their employees are uniformly lazy and rude. I'm indifferent between Fedex and UPS; never had any serious problems with either.