Hi S..
I have been with Kaiser all my life (over 40 years). I changed insurance once and immediately went back. You can choose your own doctors, so yes, you may find some that you wouldn't wish on your worst enemy, but I have had tremendous luck finding good ones. Once you find them you can stick with them. I have been to Santa Clara for emergency situations and have had wonderful care. Dr. D. Ray, (I can't remember her title), but her specialty is problem pregnancies (neonatologist?). She saw me through 8 pregnancies in which 6 ended in miscarriage and she and most of the staff were wonderful. There was one rude male nurse who asked why I wanted to see my dead baby, but the rest made up for him in their thoughtfulness and care.
I regularly go to Santa Teresa even though it is farther for me, just because my doctors there have been seeing me and my kids for years. Dr. Thomas Lin, OB/GYN, is absolutely wonderful. He knew my history and ordered every test possible to keep track of my babies. I never had to ask, but when I did he was quick to say yes. He did an ultrasound every week until I reached 36 weeks just so we could see how things were progressing.
Dr. Otto Yu is my primary care physician, and again, goes the distance in making sure I get what I need or ask for.
Dr. Mina Pai has been our pediatrician since the day of my first son's birth. She is excellent and really allows the parents to be the decision makers in the care of the child. She is very thorough and explains everything (my boys going through puberty since I am a single mom now!)
I would also recommend Dr. Biller (ENT), and Dr. Peters (Nephrologist) if these special care doctors are ever needed.
The new facility at Santa Clara is beautiful, clean and quiet. I think you will be happy there. Remember, you have the right to interview your doctors before you choose them to be your primary doctors. You can also change any time if you see someone who doesn't click for you. Don't rule out the possibility of going to another facility. You will still get the same benefits. Good luck.