We’re the Millers is about as predictable as a stretch of desert highway along the Southern rim of New Mexico. Going in, you can guess every contour and bump these characters will find on their trip to a joint realization that the real treasure to be had is in each other’s company. The trick is, of course, how funny is that winding detour. As it turns out, much to my genuine surprise, it mostly chugs along fine on a steady tank of raunchy howlers. This movie doesn’t just go for the cheap laugh, it tries to barter it down to the street level where we’re just giving them away to the movie’s very charming, if somewhat underutilized cast.