Clear scam
I only used it for two months. In month one, I did all of the exercises and took the test. In month two I skipped half of the exercises and the ones I did, I barely did them, and then I took the test. I did better in month two than in month one because they used the same test. All they prove here is that if you keep taking the same test, you do better.
Zing is a very useless product they will sell you because you’re desperate. And you get a placebo in return. Just stay away and you’ll be better off.