I've not tried any OXO cubes in my dinners yet, I keep meaning to make some slow cooker meals. Mother T bought me one of those slow cookers, been told they are super easy just got to get myself together and make something!
I bought one of those a while back - haven't actually used it yet, though (although I did at least unpack it).. Sadly I think it may end up like the steamer (in a cupboard!)

Theoretically easy .. but who gets up early enough to get it all ready in the morning?
Then again, on the basis that I never have anything in the house that's edible beside frozen food and cereal (not milk, you notice, because that goes off..) ..

i've never met anyone who eats marrow 
I used to .. my parents were big growers of vegetables at one point or another in their lives, and they'd grow these enormous tasteless watery monstrosities..
I have to say, though, that once you scoop out most of the insides and fill it with flavoured stuff like mince with vegetables & curry powder.. it wasn't bad at all.