I have one and as long as you keep it extremely well fed (I feed heavy because I have semi predator tank) and introducing them at night while the fish is sleeping, they will have much higher chance of surviving. I have about 3 red legged hermits, about 15 blue legs, 2 emerald crabs in my tank.
Good luck, it's a beautiful fish but I hope you don't have any corals because it will flip EVERYTHING.