We ship our (very expensive) instruments in Pelican cases. They're expensive but it's worth it when the value of a shipment is that high. So long as they don't kick it out of the plane over the client's country, it will arrive safely. They have a lifetime warranty on the cases too. If they break or have any problems, the company will repair or replace the case. The warranty specifically excludes three things: Shark bite, bear attack, and damage by children under five. Their warranty page includes pictures.
http://www.pelican.ca/support/guarantee.php