Has anyone done a 3 D Ultrasound at 16 weeks?

This weekend I am going in for a 3 D ultra sound to have pictures taken of the baby and find out the gender. has anyone done this? If so what should I expect as far as the quality of the picture goes this early. I am so excited, but I do not want to set myself up for something so fantastic if it isn't. I think this will be a great way for me and my family and friends to bond with the baby. I just wnat to know your thoughts.