Every bum is different, but I'll share my experience with wooden beads on a 3500 mile ride. I liked them in the rain and in the high heat and humidity of the South. They kept rain from pooling on the saddle and kept air flowing over the boys. Also, sliding back and forth across them was like having a loved one scratch my butt. Felt great!
On the minus side, I find them really uncomfortable on a firm seat after a while. I had a Corbin at the time, and it really was like sitting on pebbles.