Our staples are Kirkland bog roll, Kirkland kitchen roll, Autarky or Harrington’s dry dog food (Harrington’s looks higher priced than Sainsbury’s, but it’s 18kg rather than 15kg in supermarkets), Gusto latte macchiato pods, onions - they’re small, but they’ll blow your head off lol - garlic, Perle cat sachets and DH loves the Butcher’s Hook sausages which are huge 1 is easily a portion! Also large blocks of cheese.
As lots of stuff is brand named, so they do work out more expensive than the supermarket own brands.
The giant tubs of Kirkland non bio washing powder is good and doesn’t trigger my daughter’s eczema and last us up to 6 months.
Around Christmas, their fruit topped fruit cake is awesome.
Their sushi is pretty good value, we’ll often buy a range & it works out much cheaper than a usual pay day takeaway. The vegetables sushi is good too.
DH loves the 2 packs for £7.99 giant muffins too. We freeze a few for puddings.
I have a vacuum packer so I do buy larger meat packs & divide & freeze, but again, watch the pricing; supermarkets are generally cheaper on meat, but Costco beef is some of the best I’ve bought (and comparable to good butchers cost wise).
Have fun!