Bird Watching: Good quality mixed seed: a good idea, or a bad one?, 1 by Lady_Eagle

Lady_Eagle wrote:
I keep reading conflicting thoughts about feeding seed mixes. Some say it is a bad idea, even with good quality mixes, because birds will make a terrible mess kicking out the seed that they don't like as they look for their favorites. They say that mixes are just wasteful.

Other sources say that you will attract a wider range of birds if you use a good quality mixed seed, and you'll make your ground-feeding birds happy.

I'm wondering what you all think of this? I found what looks like a good quality mix made by Scott's called No-Waste. It consists of sunflower hearts, peanut halves, millet and cracked corn. Or am I better off continuing to feed just sunflower hearts?