Dr. Phung was recommended from my primary care physician upon learning I was pregnant. As a high-risk patient, Dr. Phung was quick to get me in for an appointment and impressed me with his caring demeanor, ability to answer my many questions, and to assuage my fears. When I had a miscarriage, Dr. Phung and his staff were amazing. They got me in right away (10 minutes notice) and Dr. Phung struck the perfect balance of giving me the information I needed and the support I desired.
I do agree that his Chino office is a bit of a mess. But the Pomona office is great - very retro, but more space and facilities. Also, he's a single-doctor practice so he will deliver after seeing you through a pregnancy which is rare and really comforting.
Dr. Geronimo is the most thorough, caring doctor I have ever seen. She listens, shares experiences, and makes sure that I am an active participant in the doctor/patient relationship. I cannot say enough good things about her.