[amluto]

I only really have experience with FedEx. The app is indeed utter trash. (Seriously, it’s so bad they should remove it until it’s useful.) Even fedex.com is pretty bad — good luck figuring out which address fields end up on the package in what order. The price estimator for different delivery classes behaves truly oddly.

And, having recently had the misfortune of shipping to the UK, eww. The tracking webpage shows problems. The phone support people give actively wrong answers. The customs clearance email team will give useful info if you email them first. And somehow the combination of FedEx + the UK was entirely unable to understand a normal person shipping to a business, and they got stuck needing an EORI. I eventually got the recipient (um, consignee) to send theirs, and the package got unstuck. Never mind that all online info is fairly clear that non-UK individuals don’t need an EORI.

P.S. For US domestic shipping, unless you have actual volume discounts with someone, use pirateship.com or a similar service. If you book directly or, worse, show up at a UPS or FedEx store without a label, you pay much, much more. For LTL freight, use freightquote.com or similar. For LCL international freight, I have no idea — FedEx international appears to be less expensive for single large items that any LCL provider I found.