I really enjoyed the Princeton event - met with a remarkable number of professors with similar interests and active research projects, and I just accepted the offer of admission in the fall for American politics. My biggest concern right now is deciding whether the political economy subfield might be right for me - I had a positive discussion about it with a professor, but it would definitely come at the expense of some constitutional/public law related classes in which Princeton has a definite strength. For what its worth, I just turned down the Yale offer, so hopefully this frees up a spot for someone.