Plantronics doesn’t have the kind of presence popular headphone brands have enjoyed over the last few years, but its slow foray into the consumer market — beyond its office headsets and Bluetooth earpieces — has turned out some interesting products. The BackBeat Sense are on-ear wireless Bluetooth headphones that are crafted to be light, nimble and easy to use for longer periods. Add to that some best-in-class features, and you’ve got a set of cans that looks great on paper. But how does that translate into real-world use? We found out.