The thing with Cyclop-Eeze is that it's not a manufactured product. It's really a really tiny type of 'pod that's bursting with nutrition, especially compared to brine shrimp. I haven't used it all that long, but I have the freeze-dried version and my fish love it. Although, the freeze-dried version is a pain because it floats from the lack of moisture. I usually soak it first. Because it's so small, it's great for all smaller fish, corals (even filter-feeders), and other stuff. Just make sure you turn off your pumps and stuff so it isn't skimmed out before it's eaten.
To sum things up, it's a highly-nutritious food source for carnivorous/omnivorous inhabitants of your tank.
There are other great foods, too. I hear DT's Oyster Eggs is supposed to be awesome, too. Especially for filter-feeders.
You can always mix these tiny foods into a homemade frozen fish food to add nutritional value.