I wrote a post about the wisdom of using Amazon Ship and Save. It certainly saved me effort when we lived at the condo because if I didn't get rock star parking, I'd have to carry kitty litter around the block. It's helped at the new house too in that it's one less thing to worry about remembering to pick up at the store.
I was fortunate enough to be home once when the UPS driver delived a batch and I told him he could simply bring it around back each month rather than schlep it up the front porch. It's easier on him because he just has to wheel his cart around back and it makes life easier for me because I just bring it down the Wizard of Oz doors into the basement laundry room where it lives until needed.
Apparently we have different UPS driver now because the last shipment or two was left on our front porch and not in the best of conditions either. I believe one or two bags of kitty litter were damaged in the process. Not worth the effort to do a refund or replacement shipment, especially since we can still use the litter but annoying nonetheless.