This book comes with a guarantee that you'll start singing the song by The Pussycat Dolls you haven't heard in years every time you glance at the cover. 
 Maybe I'd give this book a 2.5 for the angel lore; I suppose that's what I enjoyed most about the book, though most of it doesn't arrive until nearer the end. That's the ploy, though: the supernatural being romance with a human to rake in the mostly Twihard audience. Makes me wonder a little bit if it wasn't given away so clearly on the cover whether it would have a different appeal. Patch is meant to appeal to the teenage girl-and-occasional-boy (especially the younger ones) as the dark dude with the soft side for his lover. I find this trope a little suffocating; it makes me value a character less, and the same happened here with Patch. 
 I'm a little off topic. The book definitely picked up nearer the end, though I didn't feel much of a connection to the protagonist (and will never understand the idea of both fire and ice shooting through one's veins at the same time.) 
 2 and a quarter-ish. Yeah, I'll go with that.