Thoughts on Curtis Ray and his MPI compound interest saving account?

I’m 17, so I don’t know a ton about investing and saving accounts (I’m no novice either, I have a decent stock portfolio, plan to major in finance and accounting, and have been doing a lot of research lately, but I’ve been seeing a ton of stuff about Ray’s MPI account. He brags that it is so much better than a 401k or a Roth IRA. I haven’t done much research and was wondering what you guys think.