I got my GMAT training from Veritas. Their books and website is very well organized. My instructor was very knowledgeable , helpful and patient. There was no last minute changes in schedule. Entire course maintains a balance of Quant and Verbal. Veritas has instructors online if someone needs help with homework. I am impressed with their teaching method and course. I was also made to contacts with other students and form student group to do our homework together. Instructor also shared a lot of time management and prepration techniques. The best thing is that your online account is valid for 1 year.