I have been feeding NLS for a few years. My fish do great on it. No better than Hikari though. People can post studies and argue all day long, but they all generally have same end result. I had an Oscar that was raised on Hikari and lived about 15 years. That said, I have been feeding NLS. I have a middevil that is small because he will only eat a few NLS pellets a day.
I just bought 9 pure midas from Gage and decided to try Xtreme Big Fella. The midas go absolutely nuts for it. So I gave some to my midevel. Guess what. He goes nuts for it too. I was blown away at his reaction. I will probably switch over to Xtreme. It is less expensive, a lot less messy and the fish love it.