We could say it's like Amazon's FBA. They handle the fulfilment so even if there are issues with the customs etc, it's their responsibility.
All international shipping and import charges are calculated automatically and paid for by the buyer upon checkout. Once an item is sold, the seller sends it to the Global Shipping Center using the shipping method of their choice. After the purchased item arrives at the Shipping Center, the seller’s job is done.
I've heard both opinions if it worth it or not. I think it has to do with being VAT registered or not?