When I purchase an expensive keyboard or accordion, I always pay extra to have it shipped via air instead of ground (usually 2nd day air or 3 day). It is more expensive but the item being shipped is handled way less. The more a shipping company handles an item, the more likely something bad will happen.

I use fedex and have been very happy with their service.

A few years ago I shipped a keyboard via ups and it was damaged. I paid to insure the keyboard for the full retail price, but ups refused to pay for the damage. They said it was not packed properly. I used the factory box and used more packing material then the factory uses. I also double boxed it by placing the factoy box inside another box. UPS tried every way to avoid paying for damage that was their fault. I will not use them for expensive equipment.