My experience was, overall, excellent—although my parents are definitely highly religious. (To be more precise, my father is a pastor, so biology class certainly contained some outdated ideas!) However, I’m in complete agreement—relative to any other possible options, I don’t think I could have gotten a better education (or preparation for postsecondary/graduate studies) any other way.
Yeah, I got taught young earth creationism instead of evolution. But despite this, i think I was better prepared academically than most of my peers.