Never heard of them... But if you're testing the waters with a new seller, you should always send them a polite message on how to package the poster properly. You can't take the chance. Then if it shows up destroyed, you have your bases covered for a refund.
any package that shows up destroyed should be covered by the seller. It wouldn't have been destroyed if it had been packaged correctly, presuming it wasn't in a truck that was blasted by an IED