syllabary

I'm thinking of making a syllabary for my conlang.  Has anyone else used
this method for scripting?  What are some of the drawbacks and advantages?
Somehow I feel that I will have to define all the possible phonological
possiblilities before I can actually begin using it.  This makes me think
that it will be a limiting factor.  I know that the Cherokee Indian Nation
uses one and I've even seen it.  I'm probably just missing something.

Thanks.

---a.i

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