I wouldnt say they are difficult. I dont give mine all that much time or attention. You just need to keep their tank clean and the water conditions perfect. I just perform large water changes often and that keeps their tank clean and healthy. Just like any fish, if you keep the temp right and the water quality perfect you shouldnt run into any problems. I have mine currently in a 3 gallon with a sand substrate(recommended) live plants(rotala, M. lace, J. fern) and a bubbler. Mine are only babies (>2") so they will be moved into a 20 long once they put on a little more size. When I was talking to the breeder, I first thought they would be hard to feed. I was wrong, they are fat creatures that hate missing a meal. They are also quite smart. They learned to tell that the eyedropper meant food, but as I said they had poor eyesight, they would simply attack any part of the eyedropper including my hand.
I love mine and cant wait till they reach adulthood. If you are willing to stay on top of their water quality parameters, give it a go! They wont need that much space as adults, a 30 or 55 is perfect