The mild cheddar, the Divo not from concentrate juice, milk, greek style yoghurt, german peppered salami, their version of magnums and mini magnums, the basic spaghetti, the Corale baked beans, Moser Roth chocolate. Titan bars just like Mars, Seal bars just like penguins. Sardines in Sunflower oil. The Special/better tinned tomatoes. Freezer bags on a roll. Wine and cider. Specially selected "homebake style" shortbread. Parmesan, goats cheese, proscuitto. All the cereals, especially Benefit (special K). Homefries.
I am a big fan of their fruit and veg - our store has a really fast turnover, so it is fresh and I have had a lot less waste on the fruit than my usual Ocado delivery. It is so cheap that I can buy lots and we have eaten a lot more veg and more healthily at a cheaper price. (eg. pack of 3 courgettes 49p, aubergine 49p) The fresh cod, mince lamb and pork and the whole free range chicken also good. Bread ok - same as other supermarket stuff.
Stuff we haven't liked : their pizzas, Swirls (twisters), crisps, ketchup, Jive bars (twix), Choceur chocolate, cucina pasta shapes (thick and sticky)
I don't really buy ready meals so can't comment on those. I have been amazed at how easily my kids have adapted without much demur. All my Dc are home atm so feeding 6 adults for all meals plus 2 elderly for dinner
I am saving at least £50 a week - so am very pleased. I have to be a bit more creative and preplan and also can't quite get everything there. I found looking at stuff (not got the full range) on mysupermarket and making a list helped me get used to it.