Somewhere between 2 and 3, but enough to round up.
It's a longer novella, so not tons of space for character development, and that was a large part of what I was frustrated by. Especially since I wasn't fond of Zara (h) in the first place. The conflict she and Damien (H) had was really that they weren't communicating well. Especially the 'listening to each other' part of communication, which is where Zara really proved how much she wasn't worth my support. Basically, over and over and over, she twisted what Damien said into how he doesn't want her to leave the island/him, while she wants to be famous. Not make a difference, but be known. One can make a difference without being world-renowned, but she was immature enough to make it all about her, rather than her work and the results she produces. When she finally does come around, it feel unnatural - like I said, too short a book to really have space for good character growth.
Still, Damien is sweet, it's an enjoyable little escape (as long as you can put up with a rather selfish heroine), and I enjoyed the setting. Makes for a good tropical-feeling escape on a grey and rainy day. Plus, no cheating, an HEA with no cliffhangers (unless you count the possible-yet-unconfirmed existence of mermaids), and it was a free find on Kindle.