I keep going back and forth and may still change my rating, but for right now I'm at 3.5
I love the Psy-Changeling world and really looked forward to Bowen's story. I enjoyed it and it was fabulous to see more of BlackSea and their world, but I just didn't feel the chemistry between Bo and Kaia. They were both great characters and their stories were great, but they just didn't quite click with me.
Didn't stop me from being up until 2am because I just couldn't stop reading, so maybe when I re-read Ocean Light I will fall in love with it a little more;).