We had a large shipment of 14 pallets from LA to SE Washington. All the major companies (FedEx, UPS,..etc) came in at $2,500 to $9,000. One of the bidders gave us a great deal at $900. We decided to go with them because (a) they were based within three hours of were we lived, so if anything went wrong we could talk to them in person and (b) they had the best price.
The shipping company sent a truck that didn't have enough room for the pallets (as described in the bid), but after discovering that and finding another truck, they promptly delivered the shipment (another 3 days).
uBid saved us a lot of money, and if we have a unique or large shipment we will definitely consider using uBid again!