Absolutely the best when it comes to standardized tests preparation, Dia Gerontoudi Prep Center has helped me invaluably in my attempt to achieve high scores in both the GMAT and the TOEFL. In addition to the virtually limitless pool of exercises, the quality of the lab simulations and the overall help I received regarding my applications made a very positive impression on me. I wholeheartedly recommend it to anyone who wishes to achieve high scores in the standardized tests.
