It's very peaceful to sit and listen to the waterfalls and watch the fish swim around. I've had ponds for well over 20 years now and I wouldn't be without one. My neighbours cat and Max used to drink out of the pond before we got the pups. Now they tend to stay away from the back yard.
I've never had any cats show any interest towards the fish in all those years.
It's a great draw for wildlife too. Dragonflies and damesel flies. Toads come to lay their eggs. I've had frogs and turtles stop in. Ducks come in too, but I don't encourage them. Loads of birds come in to drink from the pond or the bogs too. I guess the 3 bird baths I have aren't enough.