I read books for the romance and I'll tell you now, this was full of it, which is why I liked it so much. Normally when I read a MM book, it's more concentrating on the sex, whereas this one concentrated on the relationship and how it grew from mistrust into love. It was so sweet in places and I was bawling for a while near the end.
I liked both of the main characters and how they acted around each other. They were both great guys who'd had to put up with a lot of crap in the past and when they finally got it together I was almost cheering.
Liz, Caspar's best friend and one of his Lieutenants, was also a cool character and though I thought we'd never see her again after they left Alpha, she makes another appearance near the end, which also had me smiling.
I should probably point out that it does concentrate more on the romance and it's progression that the dystopian world but it's still a good tale if you don't mind that minor detail.
If you like MM Romances that actually focus on the romance, then this shouldn't be missed. I recommend it.