1. You can purchase actual insurance for the full value.
2. No BS back-charges for boxes that FedEx determines are bigger than you measured them at.
3. They fill out all the paperwork and customs forms for you on overseas shipments.
4. Excellent customer service, no "call center help desk".
5. Great prices.
6. You can email a pre-paid shipping label directly to a seller or friend if buying a bike out of State, etc.

I've shipped a lot of rare old bikes this year and I've been very happy with Bike Flights each time.