Chromis and Damsels are great fish, however I prefer Chromis over Damsels as damsels tend to be aggressive. Chromis can be very colorful, however the variations in damsel options is much greater with more color.
The is the most awesome fish to add to your tank & I suggest adding them when you add other fish, if you areadding less than 3 fish. The new comer to the tank can be the most picked on fish, so by adding chromis at the same time, you spread the potential aggression over 4 or more fish.
Chromis are also schooling fish. They create movement and color; adding to the reef experience in your living room.