Absolutely lovely.
Claire Cullen's omegaverse books are always a joy to read, and "Omega's Gamble" is no exception: I freaking loved it.
This novel has all my favourite tropes: from slow-burn (ft. a smidge of miscommunication and keeping-secrets-to-keep-myself-safe) to arranged marriage and even the most satisfying groveling (I love a good grovel with my whole soul). 
I loved Raine and Darien, and I loved witnessing their journey towards a well-deserved HEA.
This book is the perfect balance between romance and plot, a highly satisfying one at that. The underlying plot about Stormshield and it's isolation from the world, the reason why it's so different from all the other kingdoms, was absolutely fascinating and gripping, and I seriously can't wait to read the next book to discover more.
The side characters were fantastic, the romance was lovely and achingly sweet with a smidge of spice, and although I would have loved to see more of the omegavese side developed, I still adored it.