CFCs are nice and more effecient, but more costly and a little more difficult to build. My IC works well in my keggle as long as I stir the wort, but that can be a pain if i need to do other things while it's cooling. If you are doing 5 gallon batches on the stove top the IC is a great way to cool, especially if you live in the north where you have really cool ground water. You'll also need a pump to push your wort through theCFC, I've seen some people use them gravity fed, but experience with my buddys CFC showed that a pump made it work much better.