Prep Scholar SAT Prep Results?

I got a 1330 on the December SAT and want to improve to a 1500 by the August SAT. Has anyone used Prep Scholar and seen results that were more than +160 points, or if not, were you actually able to get your money back due to the guarantee?

There are some old threads here about this that I’ve seen with people saying that they couldn’t get their money back because Prep Scholar required them to show proof that they didn’t improve at least 160 points but you can’t send official scores to organizations other than universities/colleges. I have no experience, but this is what I’ve read when I was considering using Prep Scholar. Ultimately, I decided it was too much of a risk and didn’t.