From the article:
If you were going to have open heart surgery, would you want to be operated on by a surgeon who was chosen because he had to struggle to get where he is or by the best surgeon you could find-- even if he was born with a silver spoon in his mouth and had every advantage that money and social position could offer?
Read the article. It is well worth the time it takes.
The only upside to this is that if (when) she is confirmed, she will be replacing another liberal, "living document" justice.
When Sotomayor is on the Supreme Court you can expect to discover a lot of new "penumbras, formed by emanations" in the Constitution.