I always go for their 2 day delivery because choosing same day or 1 day delivery would frequently end up in an email saying that the package is running late, an

I always go for their 2 day delivery because choosing same day or 1 day delivery would frequently end up in an email saying that the package is running late, and it should arrive some time in the next 10 business days. Not sure what caused 2 day delivery to be fine, but 1 day delivery to turn into 2 week delivery so often.