I had one (impulse buy back in the day before learning my lesson) that I rehomed from my mbuna tank.
They are "peaceful" with similarly sized fish but will eat any small fish. And they get big, 10".
The biggest issue is diet, they are meat eaters, predators, but all of my mbuna are mainly algae eaters and require low protein. If I add meat to the diet for the eye biter then I risk malawai bloat for the mbuna. If I feed vegetable based, low protein diet for the mbuna, the eye biter will not thrive. That's why I thought it was best to rehome.
Oh, I forgot to ask, what size is your tank?