If your firm is not rushing you and you have limited time to study on a daily basis, I might suggest going to the class at the beginning of your study and then study for 3 months and take the test right after sitting in the class for a second time. Here in Los Angeles, the 24 is offered every 3 months. With STC, if you pay for the class you can attend the class as many times as you want within a 12 month period.
Good Trading