Well I love them and always have a bag in the freezer!!
I serve them with a gravy, so heat some water with a stock cube in a pan - add the meatballs and heat through, remove balls and then thicken with bisto or thickner of choice.
Serve with cranberry sauce and potatoes of choice.
I had Swedish meatballs in Gothenburg, served with mashed potatoes, gravy and lingon berries (though I don't know if the latter are widely available in the UK).
I've never had meatballs from Ikea. My parents have, but they said they weren't half as good as Swedish meatballs.