I went to Cal as an undergrad and worked at GSPP in the Admissions/Student Affairs office, and I loved it there! I know I can't contribute anything about the grad school experience, but atmosphere/environment-wise, I observed that the grad students were well taken care of compared to undergrad bc nobody cares about undergrad students in general, esp at a large state school. I did take a public policy class with Prof Reich (who is an amazing lecturer btw), and my GSI (TA) was a GSPP student who enjoyed his time there. It's a good program with amazing faculty & staff, great location, so many opportunities to take advantage of everything offered on campus whether it be classes, research, fooood ... And as an undergrad, I remember thinking that I wanted to go there, but alas, I'm taking a different path.
Sorry that this post isn't really that relevant, and I'm just raving about Cal... but good luck to everyone. Go Bears!