99% of the time we do our weekly shop in the Local Lidl, when we lived somewhere where Aldi was the nearest, we did our weekly shop there.
the only time we visit one of the big 4 supermarkets is on the odd occasion we want something that Lidl/Aldi doesnt stock like Fishermans Friends, or we want something at 10pm, or i have ordered my perscription from the pharmacy in Asda. Conciquently our visits to any of the big 4 is around 1 every couple of months.
With checkout staff – if you go regualry into a store, because they have a very small staff – you get to know them and have a chat. Equally, even on busy days they dont need to open more than a couple of checkouts, and get through the queues much quicker than they do in normal supermarkets.