Hebrew Union College - Jewish Institute of Religion Reviews
It's difficult. Intensive interviews, an audition, lots of essays, a test in modern Hebrew and music theory (for cantors), and a psychological evaluation.
I love it. I am learning so much every day and I am able to directly apply it in my school-arranged internship. The faculty is wonderful. It is a lot (LOT LOT LOT) of work, but it's worth every bit of it.
It's a pretty specialized school (seminary of the Reform Movement), and so I don't think this applies as it would with other schools.