I think Orion is a great tool to study for the GMAT. I had a month to prep and it really helped me out by providing a study plan catered to my needs. Before Orion I was struggling with where to start and what to focus on, especially since I had a limited amount of time before my exam. The interface was also amazing and kept me interested with the right reinforcement and reward whenever necessary. I would highly recommend Orion to anyone studying for the GMAT!