IMEO, easy to keep, and hearty fish
The only problem as mentioned is feeding. Even though their main diet is pods, tehy can be weened very easily in most cases. The big trick is feeding them, they do not swim as most fish do. And will not fight for their food, IME there are only 2 ways to get them to eat effectively.
1) use sinking pellets, they will not come up for flake much
or
2) feed tehm frozen or fresh foods, and use a turkey baster to spot feed near them. It will get the food down where they will generally take it
With them, the trick is gettign the food to them, not getting thems ome food they will eat