This will be my tenth year attending. Greatest conference in the world. The centerpoint is read and critique, which you can do from nine in the morning until one in the morning every day. A genuine working conference. Be sure to go to the pirate workshops at night.
An epic conference. I recommend it to anyone who wants to work on their craft.
I had a great experience at SBWC too. Met my agent there (not through an agent appointment -- he and I were already communicating before we met face to face, though I'm convinced that's what helped him sign me), won an award, learned a lot.
I was there in 2001, and it was a valuable experience. Some of the worsksho[s were useful, but choose them carefully. Also, be alert and thickskinned. Most of the attendees were friendly, and some of the locals hospitable. A few of the attendees were vicious critiquers, usually the ones who come every year and remain unpublished.
Be prepared to listen to advice but also defend your writing as well.