I don't know the difference between the service of fed Ex and USPS. As I always recieve the flatrate envelopes.
because I can't spend that much money I always look out for the older series of fabric that are a little cheaper.
so I only had to pay customfees twice in all those years.
It's a pitty shipping is going up but unfortunately EVERYTHING is becoming more and more expensive....
As for the speed....flatrate envelopes from the USA always come in about 4 to 7 days after sending them....and I never had anything get lost or damaged.
When I order in the UK it takes longer to get here ;-)