My experience was you have no choice on delivery time lol!
They were going to deliver it on our anniversary when we were due to be out. When
I asked could it be they day after they said I would be charged a 24hr storage fee for the extra day.... Til I got upset about our wedding anniversary and they caved!
Other than that, all good! We took the trolley through thy scanned the items and took payment, and gave us the delivery date x