It's extremely well researched and organized. It's written in a 70s-era academic style that hides the subject of the sentence (or paragraph), and there were times when the sequence of events got confusing. It's a piece of its time, which is to say that I raised my eyebrows a few times at certain statements.
That being said, it's meticulous in its detail and he got some great personal anecdotes that lightened up what could have been a really dense book. It's a good resource for anyone who is interested in Latin American Politics during the 1900s and the Dominican Republic in particular.