I was very impressed with Magoosh for many reasons. The material was great - very informative, relevant and realistic, and video explanations for every problem are provided. Even better was the format, which allowed you to take dozens of computer-based specialized quizzes and section tests, allowing you to focus and hone your skills. The customer service was the best I have ever experienced, with responses usually coming within several minutes. Amazingly, Magoosh extended my subscription for free, since I had not used it much before it was due to expire (I was still focused on my work/research at that time, not focused on GRE prep). After studying for several months using Magoosh almost exclusively (I used Manhattan Prep flash cards too) I got a 323 on the GRE (4.5/6 on AWA), which was higher than I really needed. I would recommend Magoosh GRE premium to everyone, it is a wonderful product!