What I like about using USPS is that it is cheaper AND faster than any courier service! I've had stuff sit in a UPS customs warehouse for over a week before it was sent to me.
My last dealing with UPS was on a shipment from a composites company in Ohio that didn't deal with USPS because they said they had too many problems with theft during transit and up to six months to have insurance claims addressed. A valid concern, I admit, but my order with them was $245 in material, that cost me $105 to ship and $80 in brokerage and tax (fortunately only 5%) on the value of the shipment AND the shipping fees. I REALLY wish they would have sent it USPS! Since then I've found another supplier who will ship USPS.
By the way, as much as I'd like to save money on taxes and customs brokerage fees, I won't let any business to either lowball the claimed value or send me something as a "gift" unless it really is. Its a personal decision but for me that would be unethical. At the same time, if I have something sent separate from the initial order because of a backorder, I will not pay extra tax or brokerage fees if I have already paid them once. I've had to bring original receipts and packing lists to prove that something was backordered but its the principle of the thing. Same goes for items that are sent as warranty replacements. I've already paid the tax and brokerage so I shouldn't have to pay it again.
One of the nice things about archery is that there aren't any export restrictions like there are for firearms and accessories. Boy, I tell you THAT is a nightmare to deal with!