UPS FAILED to deliver samples at guaranteed time for an important sales meeting for my start-up. Having paid a premium for guaranteed delivery, I didn't even get a refund as they said it was the result of an "emergency". Actually, they changed the reason 3 times when asked! They say it's an "emergency" to be cleared from living up to their own T&Cs. I WILL NEVER, EVER USE UPS AGAIN. UNDER NO CIRCUMSTANCES. NONE. Total cowboys and totally unwilling to take responsibility for their own mistakes.