Good stuff. Im in the same boat as you re borderlinx. Only problem I have had so far is that one seller refused to send to COMC because it was a PO Box and they could not get tracking for a PO Box.
Looks like a good service though.
Not sure what the seller is on about... tracking shows delivered on the stuff Ive had sent there....
What I love is $5 a month plus shipping in the ONE SAME box (lol) could take the costs down from $100 for 20 packages/cards with borderlinx to $35-40 with tracking and insurance (priority or whatever its called)