Let's Make Robots!

32 channel servo controller board

32 channel servo controller

While browsing for robot parts I've come across these small boards that can control 32 servos. I've had a quick browse at the manual of these boards and to use them you just sent some characters over serial to the board, seems simple. Now my question, what is the benefit of these boards over for example an Arduino Mega? Expecially the difference in programming a Mega with a lot of servos connected to it or using the servo controller board connected to an Arduino board? In the future I would like to built a big walking robot/hexapod with a lot of servos.