I have only been to Waitrose once. When Brent Cross shopping centre opened way back in the 70's I ventured in there. I have hated precinct shopping ever since. Always over priced and full of people with too much money to waste.
Asda is cheaper. We have all Sainsburys shops locally and it's always much dearer there so MrAsk usually drives to Asda or Morrisons. Aldi and Lidle are Ok for fruit and veg but it's knowing what to choose from their brands for other groceries.
Only have Morrisons and Iceland locally .I can't stand our local Morrisons .I think they stand back and throw the things onto the shelves .It's such a muddly place .We have no car though so needs must .But ..my dear old brother takes me shopping about once a month and we do the rounds ,either Aldi ,Lidl or Sainsburys .
I also shop locally though at the butcher ,baker and we go to a farmers market once or twice a month .I shop on line now and again at Sainsburys .