Doesn't matter what big name company it is, according to my informed source .. ok, the clerk at the grocery store.. says you don't get the same results with no-name brand condensed milk. It should be used only when a minor part of a recipe.
She told me this when I made my fudge ingredient return. No worries now, I've given up on making my own.
I used the money to buy flour and icing sugar. Today I make shortbread.