There are different sources to study for the USMLE. Sticking to one source of study might give you more consistency and better follow up on what you are studying but not necessary will give you the ultimate grade. f you want to compare Kaplan notes to other material you will find that they might be more thorough in some but less thorough on other subjects. I used Kaplan notes but was amending from other books like pharma and ID. The method you choose to study should depend on how much time you have. I suggest you look at these different sources and combinations you can do: USMLE Material
Mohamad Kurani, studied Internal Medicine at SUNY Downstate Medical Center (2013)
Source: Quora Digest
There are different sources to study for the USMLE. Sticking to one source of study might give you more consistency and better follow up on what you are studying but not necessary will give you the ultimate grade. f you want to compare Kaplan notes to other material you will find that they might be more thorough in some but less thorough on other subjects. I used Kaplan notes but was amending from other books like pharma and ID. The method you choose to study should depend on how much time you have. I suggest you look at these different sources and combinations you can do: USMLE Material