I mostly use it to track international eBay, Amazon and Wiggle shipments.
>> Ability to edit ALL the details of a shipment. Sometimes senders publish a Ref no in the tracking numbers information. This is later updated with the known Tracking number. It feel like bad UX that the user has to delete and then recreate the shipment to "edit" details.
I must say I love your portal and love the fact that I can view all my online shopping tracking in one view. Well done!