We’ve been Costco members for years.
Many of the groceries are premium brands, so if you usually do a shop in Lidl (like me) & buy non brand items, you’ll be paying more even in bulk for the equivalent in Costco.
Costco’s own brand Kirkland can work out cheaper than, say, Lidl’s own brands, but not every item has a Costco own brand version.
We always buy Harrington’s dry dog food (18kg for around £23, Sainsbury’s 15kg Harringtons - different flavour - has gone up to £26.50). And Gusto coffee pods, Heinz beans, cheese (can’t remember the brand now lol!) and Andrex loo roll. And Pepsi. I noticed today they have Quality Street tubs for £3.49 (I think they were £5 in Sainsbury’s on Saturday), and have a huge 2kg tin for £15.
From their own brand, the Butcher’s Hook sausages are huge & really good (DH loves them, I can’t stand sausages lol), UHT milk & their huge muffins (diabetes means I just look longingly at the packet now lol). And their huge Kirkland non bio wash powder is one of the few that my daughter isn’t allergic to! Expensive outlay at around £15, but lasts for around 5-6 months.
Sometimes we’ll buy the sushi packs & they’re OK compared to our local, expensive & a bit crap sushi place locally.
The only thing I hate is the size of the trolleys, they are huge & at 5ft 1 & find I’m pushing it with my hands at boob level 😂
Also, the fuel prices are lower. I think we’ve already saved the cost of membership with a full tank each month for 4 months.
Definitely don’t buy the ginger snap tins of biscuits, they are the ginger equivalent of crack! Bloody hell, they’re good (and utterly bad for me, because bloody diabetes 🤣).