We had kaiser for years, and it was fine. I was able to receive care for pregnancy, stitches, vaccinations, etc with little hassle and mostly reasonable billing.
Then we moved. Omg, I can’t even get appointments to get a rash looked at, or a sinus issue, or vaccinations. And most of those are pediatric issues! My son minorly broke his arm, and didn’t even need a cast and I got thousands of dollars in bills from four different companies.