Which courier company was this sent through?
Some would not accept this due to insufficient packaging. Also, as stated above - packaging like that won't work for you if the item gets damaged. Even though it might be better than cardboard in some cases.
Personally, I like to wrap the bass In bubble wrap/stretch, put it in the case, wrap the case and put it in cardboard box. Another stretch and then some fragile tape on it. I seem to sleep well after I send a bass like that. I don't think I would if it was only wrapped like yours. Glad it arrived safely :-)