I don't know if anyone has had problems with the postal service delivering their packages (besides Amazon)...
I highly recommend purchasing the tracking/confirmation... even though it is a few bucks more (and adds the inconvenience of someone having to sign for it, and having to go to the post office if they aren't home to sign for it).
A week ago Tuesday, I sent my pal her package... insurance and all... and she still hasn't received it. :(
So, from now on, I'm purchasing the tracking option.