(I received this book through this site's giveaway program.)
Overall, I'd say that this is a very solid first draft of a novel - which, looked at the other way, is the same as saying that it's not a terribly good finished product.
To begin with, the characters are all very believable, but they're slightly hard to keep straight and they don't feel like characters in a story. Some of this could have been remedied by introducing the characters in more memorable ways; some of it could've been fixed by leaving some characters out altogether (as they add little or nothing to the story) or merging multiple side characters; but the basic problem is that none of the characters has a clear, established place or role in the story. As a result, the book feels like what it probably is: a lightly fictionalized version of real events. That's not the worst thing in the world, granted, but it's also not what I'm looking for in a novel. Real life, like this book, is too random and disconnected and particular to make for a good story.
And because the book is so true to life, it's also hard to identify any recurring themes or motifs in the text. Obviously political issues arise every now and then, but, to reiterate, that happens in the same way that political issues arise in real life - namely, without a terribly satisfying rhythm or pattern and without all that much of a resolution. For the first half or so of the book, this actually makes it very hard to even figure out what the story is supposed to be about.
Finally, I personally found the prose to be very elementary. Aside from a few well-written descriptions of the city of Havana, the book's vocabulary, sentence structures, dialogue, and verbal pacing are all quite bland. In this regard, too, the book just feels like a recitation of events that happened in reality.
The good news, such as it is, is that the story picks up somewhat over the last, say, 50 pages. And I do think that the subject matter is a good one in some abstract sense. So if someone took this version of the book and really worked on it - sharpened the characters, massaged the plot, spiced up the language - I think it would serve as a valuable window into a particular kind of Cuban story. As it stands, however, there's not a particularly strong reason to buy or read it.