I don't know of any disadvantage so far. It's what I'm running.
There could be some problem that no one's noticed yet.
It started out as just the ma7 source from samsung which was based on linux 3.0.31 or so, and he just applied all the incrimental linux patches from there to current 3.0.63 or so. It still has whatever changes samsung had in there. So it should be basically the same in any way we can even detect. The only real difference is he enabled a bunch of different cpu speed governors. You can just ignore that. If you don't use setcpu or similar to pick a different governor then the default one is the same.
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