When I first took a cold GMAT focus mock, I scored a 535. I then enrolled with TTP. 2months later I got a 655 in the real exam.
TTP is the best place for building strong fundamentals and having a clear cut path to a good score. I actually scored 755 in the official 4th mock so although 655 is good score, I actually could have gotten a lot more because of how strong I became because of the course. Just had an off day in the DI section.
So if you've been reading a lot of reviews on which prep products to buy. Trust me, just buy TTP and a few extra official mocks and you are sorted. There's nothing more you'll need. Their structure and specificity is such that you'll always feel in control of the prep and not the other way around.
Follow the schedule that TTP sets out for you on the basis of your inputs. This schedule was so very helpful and it ensured that I complete the prep quickly and on time, without skipping anything and being secure of everything that I was learning because of constant testing and recall.
All the best to all future test takers! Pick the right tools for you and don't let a test become your personality, get the score you need as fast as possible and move on to other things!