The Economist GMAT platform helped me to achieve a 90 point improvement on the GMAT! I loved the ease of use of the mobile app and how I could study on the go or while waiting on people or appointments. I really needed improvement on the quant, my verbal was already in roughly the 80th percentile but it improved to the 93rd percentile as well.
Jake Wengroff really was by far the most helpful and caring tutor. He did an excellent job helping me comprehend some of the quant concepts and all around went above and beyond.
The one con of the Economist course in my option would be the inability to shift ahead to later topics but at the same time my score really improved so it could mean that their order served its purpose. Overall I would definitely recommend the Economist GMAT course.