Hi Gaz.
These cats eat like nothing on earth....insatiable appetites,the growth rate is alarming to say the least.Although theres always someone out there that will chip in with.....my cat has never caused any problems,it lives with Neons and so on....i can tell you from experience this species doesnt only rearrange the tank with sudden lunges into the substrate it also often damages other fish(tank mates) during the night......not worth the risk,thats only my opinion of course,you make your own mind up.
Good luck!