It is a personal preference really, a cream/no cream deal. There is no right answer. I have used many different systems of drainage, and can honestly I do not prefer one over the other. The good thing about false bottoms is that they are a lot lighter than if you were to use gravel, or even a light drainage such as leca. If you have a waterfall it helps to use a false bottom, but you can easily avoid doing one by hiding the pump under a piece of driftwood or something along those lines.

Heres a link to my article on false bottoms:
http://www.freewebs.com/kapoktree/falsebottomviv.htm
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A room of herps.
www.freewebs.com/kapoktree