To the skeptics: Have you fed NLS exclusively for months?
Being carried in Petland, Petco, etc. is different from advertising. NLS does have advertising, but very little. Evne the advertising they do is not much more than 'this tank of fish from all over the world with vastly different diets is thriving on NLS exclusively for twelve years and counting', they let the results that their food produces speak for them.
A high quality pellet is designed by nutritionists to be a complete and balanced diet. A hobbyist feeding a hodge podge of 'natural' foods is guesswork at best and will likely not come close to what professionals can produce in a high quality pellet. Just because it is a prepared food doesn't mean it is low quality (at least not necessarily, although there are a lot of low quality prepared foods). And just because something is 'natural' (and usually far from being truly natural) doesn't make it better.