I chose Experts Global for both my gmat test prep and for the application+interview process.
For gmat prep, firstly, I was extremely satisfied and impressed with the study material they provided. It was vast and covered all aspects. Second, they prepared a study plan for me to follow basis which I practiced questions. This was extremely useful in tracking my progress and identifying weak points. Third, their test series (set of 15 tests), is, in my opinion probably the most accurate and complete test series. The software and the visual interface was in sync with the actual test. The mix of questions and difficulty level was spot on when compared to actual test. In the end, my real gmat score was in sync with the score that I was getting on average with the EG mocks.
For the applications and interview prep, the process was comprehensive and was explained in detail. Again they prepared a tracker which laid downed the steps that were to be undertaken along with due dates which was helpful so as to not fall behind or get burdened with last minute work. We came up with a general strategy and story through brainstorming and basis my work exp. This helped me identify and finalise my post Mba goals. All of this together helped me come up with a story that I could write in the essays which they fine tuned and polished. There were certain aspects of the application process wherein they recommended me something which I initially did not agree with but later realised had I done it my way it would have been problematic and we could have had an unwanted result. In addition of course, they were very helpful and polite with my queries