I actually got a little fun sized box of Fruit Loops from an american import site a while back, and as I recall I wasnt that impressed by them. Not nearly as sweet as I'd expected and not even all that much flavour to them.
Had the same issue with Apple Jacks. Could taste the cinammon, but the apple flavour was weak as hell. Fruity Pebbles, Cocoa Pebbles or Marshmallow Pebbles on the other hand... yum yum!!