I do offer EXPRESS delivery, because I don’t have a huge amount of orders (not yet, hopefully), so as of now, I’ve had no problem in delivering my work at a good quality in less than 24H. BUT, I’ve experienced one late delivery because I was waiting for my buyer’s reply which was necessary to complete and deliver the work. The buyer couldn’t reply to me in time, because of time difference and… yep, LATE DELIVERY. So, from that day on, when I notice there’s a big time gap between my location and the buyer’s, I indicate at least 2 days delivery time. Anyway, it depends on a LOT of things. Try working with Express Delivery for a while and see if it works.