I think I've read too many YA dystopias lately, because I can barely keep them straight. This one is the end of the trilogy that started with Delirium. The concept, that love is regarded as a disease, and that people are surgically cured upon turning eighteen, is pretty cool. In Requiem we find our heroine wondering if she'd prefer to be happy (cured) or free (starving in the Wilds). Frankly I often wonder the same thing, regarding how medicated we modern folk are.
For more exploration of that topic, you'll have to read my zine.
I wasn't crazy about the love triangle aspect of Requiem or family semi-resolutions that seemed too pat. The one element from the first book of the trilogy that I appreciated was the return of Lena's best friend Hana who comes to us post-cure, and about to marry a powerful jerk.