I have no personal experience with him, having only heard him talk at other's lectures, but he operated on my mother twice while he was at UCLA--once for a cancerous condition(early stage, resulting in hysterectomy) , once for a noncancerous one. I was out of the country at the time, but she recovered well from both. I understand that he is considered quite an authority on a variety of OB-GYN malignancies.
http://med.stanford.edu/profiles/vie...Jonathan_Berek