Based on the limited exposure I've seen on Palin via CSPAN she comes off as a intelligent well spoken individual. However, based on whats been uncovered on her she is also lacking in common sense, isn't very worldly and probably raised in a very insular environment.
She will probably preform well in the debates and clearly has lots of poise. Of course the debates are pretty pointless at this point, as candidates rarely directly answer the question asked. Just find some why to spew their normally rhetoric.
She's a puppet under the control of neo-conservatives who will make damn sure she stays on message for the next few months. Those same neo-cons who are causing life long moderate conservatives who routinely voted Republicans, like my dad, to potential vote for another candidate.
Having neo-conservatives values is hardly a primary qualification to be the VP who is potentially a half-heartbeat away from being the president. Can you imagine what the rest of the free world would make of someone who thinks Creationism should be taught in schools?