i think it depend la. example, poslaju kuala terengganu provide good service to make sure dijamin sampai esok. they start using motorcycle many month ago. my poscode not even in the list dijamin sampai esok. but so far all stuff the seller sent to me delivered to me on the next day. below is the envelope of posekspress. One with "Dijamin Sampai Esok" on it, and one dont have. =)