This is an excellent product. It works very well with my Sony HVR-Z5 You have to be careful if your camera is one of the earlier models such as my HVR-270 since you will need a firmware upgrade that only Sony can do. I think it costs $300.
Otherwise it essentially handles every control in the camera. The focus is very smooth and stable and the long cord allows you to manage your camera from a long distance away giving you the opportunity to handle more than one camera using a monitor.