I love mine! He became the favorite in my tank real quick. I liked him so much I bought a second one, which was a little bit smaller but not by much, but still turned out to be a bad idea as the larger one was very dominant over the smaller one. I had to remove the smaller one from the tank.
It had zero issues with my Black Arowana, however, it had plenty of stand offs with my Leaporinus. They never had an all out battle, just the stand offs.
Their mouth is huge. Small feeders disappear quick and if you dont break up the frozen bloodworm blocks they will eat it in one snap. They don't seem to bother with any flakes I throw in the tank. They down the flowerhorn pellets, bloodworms, feeders, and other meaty stuff.