I have not taken the exam, but I had kaplan materials and it looks promising with the many questions they have online. You get 3 month of free online quizzes when you buy the book. My 2 cents.
Thank you .I think I'll buy the online course though it's a little costly but this is my second attempt so I will give it a shot.Before I tried magoosh but I guess one month is not enough for someone who has no idea about gre.