Best SAT Prep classes

Anyone with older kids have recommendations on a SAT prep class that is worth the $$$ and truly helped improve scores? TIA

Re: Best SAT Prep classes

I have heard Kaplan. And I used them a million years ago. They had (and still have I believe) a guarantee that if your score doesn’t increase, you get your money back. My score increased 100 points after I used them. They weren’t cheap back then. I had a few friends use them. Our parents signed us up together and took turns driving/picking us up. All of our scores increased.