What a lovely surprise. Dex and Em (Em and Dex) are the most multidimensional characters I've read in recent memory. They're terribly flawed, but they're real and entirely relatable. You get to know them, you love them then you hate them, you get to laugh with them and then get pissed at them both. It's not sappy nor corny, it's not chick lit nor fluff… it is just a pragmatic and cleverly told story about the most real of friendships. A real relationship that bares all its true colors and everything that it implies.
It's not a story for everyone, but it's one I honestly enjoyed and eagerly recommend.