Dia Gerontoudi Prep Center has been a valuable help and the key to success while preparing for my GMAT and IELTS exams. The materials were well structured and the entire preparation was focused on my needs and weaknesses. I worked out of Athens while preparing for the exams and I was impressed by the progress I was able to achieve via on-line lessons. At the same time, all the tips and pieces of advice provided proved to be exactly what was needed for the exams.
