Thea, I earned the LWMC credential six years ago.
Everybody is different. I am the type that will use all the resources so that I feel confident going into an exam. Too, the resources that I purchase ALWAYS play a part in my professional growth. I tend to see it as investing in oneself.
As a consequence of this approach, I have only taken and passed exams the first time around.
Hope my perspective is useful to you.