Anyone who knows me from other forums (especially cyphos.com) knows I'm more than willing to engage him in a debate, but essentially I agree with Neil (RD) here. I have no particular brand loyalty when it comes to fish food. In other words, I'm open minded, have no particular motivation to convince someone else to conform to my fish food opinions, and have no problem investigating a new product, or trying it out if it looks promising after checking out ingredients and guaranteed analysis, etc.
Was a time I thought Hikari was among the premium foods out there and it was one of the products I would use, until some years ago when I did some pretty extensive food testing, for my own reasons and not a consequence of forum debates or anyone's marketing. Side by side tests, same spawns, grown out in separate tanks, different foods, over more than one generation. I could name several products that gave me noticeably better results than Hikari, color, vitality, etc. and NLS is among them. Debates and technicalities aside, I don't care what anyone else thinks and I look at ingredients and analysis lists and go with what I see for myself in my own experience, period.
Meanwhile, during the same years I started doing a good bit of reading on fish health, nutrition, etc. and, suffice it to say, since doing so I would not feed my fish any product with the high ash content of some of the Hikari products (17% in Massivore, are you kidding me?) or with something as ambiguously identified as "Starch" listed high on their ingredients list.
Also, I was happy to hear a couple of years ago that NLS eliminated soy as an ingredient, for reasons Neil and I had no little discussion about once upon a time.