I use it, and if you look at the list of ingredients it seems to be higher quality than a lot of other brands, like the flakes use whole fish instead of fish meal, there are fewer "fillers", etc. I've also heard really good things about Ocean Nutrition brand but I can't get it locally so I don't have any personal experience with it. My fish really like the Omega One though, I use the veggie flakes, the cichlid pellets, the color enhancing flakes, and the veggie rounds.