I read about it in some magazine and then saw a banner for it over on Aquamojo's page. He helped me out a ton when I was picking species for a tank i was building
Went to buy some fish he suggested and the lfs carried the whole line so i bought some to try. Ive since switched over all my tanks to their food.
Persoanlly, I think NLS is great food too, but I have no local source for it. My two local Petco's' are lame. They stock the beta food and thats about it. I bought it online when i used it. Now it's just easier, and cheaper to pick the Xtreme up locally. I think it's just as good as NLS and can say it's a lot better then Hikari, just based on color development. And all my fish love it, including my plecos. They come out for daytime feedings now when I feed the cichlids