I haven't read that much about her yet, but my first reaction is that she is a very reasonable choice. She certainly doesn't seem to be a Ginsberg, I think she may be more comparable to perhaps David Souter.
I think her nomination shows how politcally shrewd Obama can be. He knows how to play the game and has already put the ball in the court of any Republican opposition by nominating a GHWB appointee. Like him or dislike him, Obama is a gifted politician with sound reasoning skills. Pretty much the polar opposite of GWB.
The first 4 or 5 days will probably tell the tale, but I'd be surprised if her nomination doesn't go relatively smooth.
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In essentials, unity. In non-essentials, liberty. In all things, charity. Augustine