On one of my wife's families, I didn't bother to get the will of the ancestor. In fact, I never looked for it. The records weren't microfilmed and I already knew "everything" about the family from other records. If there was a will, it wasn't going to tell me anything I didn't already know anyway.
The will was short--"everything to my wife." The order probating the will mentioned all the heirs, including a child in a mental institution, complete with the institution's name and address.
If possible, don't leave records ignored because you "know everything." There still may be clues in those materials.