I agree that everything is worth a try. The only thing that I have really hated is the coffee (seemingly the "gold" brand) - just awful.
Really like :
Cereal - their no added sugar swiss muesli is great
Bakery - part baked baguettes, brioche loaf, bagels (not the ones in a pack of 4, 2 on each side - they're really hard, but the plain ones in a stack of 4 that look a bit like the New York bagels packaging), potato cakes, scotch pancakes, naan bread, individually wrapped choc chip brioche
Dairy - milk, greek style yoghurt, lemon fool (sooooo good), individual fruit yoghurts
Orange juice (looks like Tropicana - that has won a Which award)
Deli - cheese (can't remember the name of it but the extra mature in a black packet - think its called David Winstow or something), parmesan, ham - I think the opposite of previous posts - it is not the plasticky ham that you'd expect for the same price at TEsco or whatever, its proper meat with rind etc, but the smoked varieties are quite salty so go with unsmoked)
Other stuff - Thai chicken curry (in chilled section) really good for freezer emergencies, breaded camembert, unsalted cashew nuts, Lacura creams, cheaper for food bags, jams (particularly apricot and sour cherry), red wine, prosecco.
I agree that the fruit and beg is very good value but it won't last a week - you need to use it very quickly I find.
Haven't tried their meat yet.
Hope that helps.