Long story short, TST prep has helped me a lot. Every time I was doing mock tests, vocabulary questions and others practice questions I was feeling that I know nothing because of my multiple errors. However, this specific fact motivated me to work harder and prepare more. Especially, tips for boosting ur listening, reading and speaking scores have helped me enormously. In the end, I just want to greatly appreciate all the work and efforts that TST team is putting in their products and videos. There are really helpful! Trust me!
P.S. I believed that it is not possible for me to get 100+, because all teachers were saying that. And here I am with the score of 104, with 28/30 at speaking part and 29/30 at the listening.)