Enjoyable, but not in a sucks-you-in-and-won't-let-go kind of way. I easily managed to put this one down several times, but each time I picked it back up again, I was drawn into the story. It also picks up in the last quarter. I liked Janelle, but felt she was maybe a little too awesome for a high school girl. Like, she needed a flaw or two so to keep me from hating her. 
 I liked the twist to the paranormal aspect, which is just fun enough to make the "mysterious guy with mysterious powers" schtick from being too banal. I would have like to spent more time in the alternate universes. That's what I'm hoping for book two, though it sounds like it will be more post-apocalyptic. I'm cool with that, too. 
 Also, loved the relationship between Janelle and her brother. My younger brother and I were close, so I could relate to it. Hoping there's more of that in the sequel.