I actually like the way they look and move but they get so big so fast and are really hard on a planted tank. If I had the room for them I would use the space one a more interesting fish (to me that is) maybe an African aro. The main reason they get bad mouth is that so many are sold to people who did not do the research so you end up with a dirty 30g tank holding a miserable 12" pacu. If you have the space for a 3' fish weighing more than 20-40 pounds that eats all your plants then go for it, just don't complain when it gets that big and tears up you aquascaping.