I read his books when I was fresh out of college. They got me really fired up, but not in an actionable way to actually do anything, because it was really vague. So, as a read, I loved it, but as a helpful tool, not really.
A decade later, I think back on the books with a far lower opinion of him and many of his ideas. Even if you are interested in real estate investing, you might be better off looking in a different direction, simply because I'm not convinced of his personal integrity at this point. Paula Pant is an example of the type of person I'd try to connect with about real estate before revising any of his books.
To counterpoint that, reading MMM got me equally fired up, but in a way where the advice was very applicable and specific enough that I could take action. And the more I read of MMM and the community surrounding it, the more impressed I am with the character and integrity of the group he's formed.