Inquiry for SAT prep courses

First of all, I’m not interested in online courses. I’ve done enough reading and studying on my own using resources I could find. I’m not interested in prep courses with an actual instructor who could guide me through and give me feedback. I’m from San Francisco, and I found TestMagic to be one of my considering options. Anyone had any experiences with them? In addition, I also found one of their discounts coupons for 4 hours of one to one tutoring. buckslive.com/deal/63/testma … -testmagic

Any comments would be great to have. Thanks.