Who has been to Six Flags (California)?

Was is it fun? Was it worth it? Sorry for the inconvenience, but my friend asked me if I wanna go to the Six Flags in California, but I have a small fear of roller coasters (mostly due to the height o at times, flips) and I really want to go, but I don't wanna back off cause of my fear. And that is why I need some of your guys' thoughts o advice. Please....T^T