S2 Auto marking?

Hi, I have seen a few posts about ACER’s automatic essay marking however seems to be a little inaccurate compared to peoples real scores. Seems as if most people get stuck around the 65-70 range with marks and then score 70+ on the real thing. Whilst researching I found Frasers has AI marker for S2 (link: https://www.frasersgamsat.com.au/section-2-ai-tutor )

Has anyone had any experience with this or anything to share on other forms of essay marking?