Films about con men are notoriously difficult to pull off. With just the right tone, cast and script, the results can be exhilarating and fresh (Ocean’s Eleven, for instance). But without the perfect elements in place, moviegoers can feel like they’re the ones being swindled. Focus – the latest vehicle for rapper-turned-TV-actor-turned-biggest-movie-star-on-the-planet Will Smith – toes that line for much of its 105-minute runtime, but ultimately, the film winds up being fun and enticing enough to win over its audience.