The irony of the Indigo Girls is that you love them for their perfectly in-sync harmonic partnership, but the longer you do, the more you hear how very different their individual styles are. Here, both sides of this paradox are highlighted. There are plenty of the sweetly familiar love songs (see "I'll Change"), and they're mostly helmed by Emily Saliers. But when Amy Ray steps up to bat, things get darker and more divergent: "Driver Education" has a retro rock feel, and "Sugar Tongue" burns with an AM gold groove. Still, we don't know how to explain the first track's "Genie in a Bottle" vibe.