I also live in the Atlanta area and had Kaiser last year. My dh changed jobs and now we are with a PPO. With Kaiser, we paid the same premium and less out of pocket. PPO is more out of pocket, but less of a hassle and can go to any doctor.
Kaiser is a real pain in the rear if you need a referral to see a specialist. It took 4 trips to see a doctor (so yes, 4 copays) and her regular pediatrician laughed at me and told me she there was nothing wrong with her - saw him twice for the same issue. I went to another facility and saw another doctor. On my 2nd visit with him, he gave me a referral and said, "Kaiser doesn't like giving referrals. I don't think there is anything wrong with her, but I will give you the referral." My dd sees a rheumatologist now and she has an auto-immune disorder that requires a yearly urine test. She needed that referral - so good thing I was persistent.
We were at WDW and dd got sick. The same doctor gave her a prescription for an ear infection - amoxicillan - even though she has a proven record that amox does not get rid of her ear infections and needs something stronger. Every single time she had an ear infection they did the same thing - amox, then she got another round of something stronger. (I finally went back to the other facility and got that other doctor who ended up approving the vaccine for the ear infections). Anyway, the day after her amox was gone, we were at WDW and the fever came back and it was 102. I called Kaiser and they told me that I was out of network and they would only cover a doctor visit if I took her to the ER, which had a $100 copay. I ended up having a doctor come to my room and paid out of pocket.
My friend has Kaiser and she had trouble with her pediatrician (same one my dd was seeing). She told him she felt her son needed to be tested for dyslexia and he told her he didn't and that Kaiser didn't cover it. She paid out of pocket (couple thousand) for the test and he does have dyslexia. She now sees another Kaiser dr who told her that Kaiser does cover the testing, but too late because she did it on her own. On the other hand, this same friend now has colon cancer and she said they have been surprisingly good and she has had no problems.
My other complaint about Kaiser - you have to go to their facilities and if you need a dr on the weekend, only select facilities are open. It would take me about an hour to get to the nearest one with weekend hours.