I recently purchase lenevo zuk z1 I like the fast delivery that Amazon deliver the product and the accuracy of the time that the amazon delever 1 day delivery is really fast and on the time that they promise yes u have to pay for the fast delivery charge but this type of purchase like u purchase from a store u dont have to wait for 4, 5, 6 day for ur stuff and also the packing of the product was good I also order back cover and that also in good package