Time to process is too long. Notification method is broken, they write to you by normal mail with a reference number that's different to the international tracking number. By the time you get the parcel which is supposedly on a 48hr service it can easily have been in the country for over a week. The duty/VAT is almost invariably calculated wrongly, but the running total is in my favour at the moment.
Fedex, on the other hand, just deliver the parcel straight away and then invoice you for the duty and fees.
MBQ