I am ready to purchase some study materials and start getting ready to take the GMAT at the end of April or early May and wanted to know which ones I should purchase. I'm leaning toward the Manhattan GMAT materials as the reviews I have read indicate that they were the most helpful considering the questions on the test but I wanted some opinions. I will be studying by myself 1-2 hours over 3-6 days per week for the next 45-60 days. I will have limited time to study and take practice tests but need to improve my score drastically as my practice exam score was a 500 and I feel I need to get between a 650-700 in order to be admitted to Kenan-Flagler's online MBA program as that is my primary MBA target at this time. If you have any suggestions and/or feedback it would be greatly appreciated.