Sainsburys cheap???!
I avoid sainsbury most of the time because its not cheap. And its fresh produce is shite. Our local one always has far too much thats really short dated, so you can't do a weekly shop there, unless you are really careful. Its only good for top ups. The larger one in town is better for that, but if i'm going to go to town, I'd rather go elsewhere. (Not least because it suffers from a need for a refurb cos its so dark and dingy.) There is no good reason to go to Sainsburys except if you are right next to one and short on time!
Tesco is crap generally too for produce, but good for kitchen cupboard staples and household goods. Its own brand processed stuff isn't bad. And pampers generally always decently priced.
Asda comes up cheapest of the big three. Its a bit of a compromise option though. Does things average but consistent. When it has good deals on, its worth bulk buying on branded stuff.
Morrisons produce and meat is better than all three.
I tend to only stray into Aldi / Lidl at Christmas time. I hate their processed ready meals but otherwise they are good for food but the selection is limited and thats the big thing that puts me off. I know thats a plus for other people though. Love them at Christmas. I should do Aldi / Lidl more but the aisle of tat is a particular weakness of mine so it never ends up as cheap as it should anyway.
Co-op do the best pizzas. Bar none. And the co-op sausage rolls are food of the gods. But expensive. Good otherwise only for emergency bread and milk.
M&S food. For service stations and train stations only. Or how to spend unwanted M&S gift vouchers.
Waitrose? Just fuck off Heston. I'll never forgive after what you did to mince pies. If I really want posh, i'll do a long run out to Booths instead. Beeeeeerrrrrrrrrrrr and chhhhhhhheeeeesssseeeeee.
I may be a sad case, who has considered my options too much.