As GPS, wrist-based heart rate watches go, the Coros APEX Pro Premium gives off the vibe that it knows it's more focused on the adventure with you that some of its competitors. The Pro doesn't load down the lightweight body with music or pay functions, and its main display focuses on keeping you up-to-date with your steps, active minutes, heart rate, and estimated calorie burn. It's a watch designed for daily fitness and adventure seekers. And at a feathery 59 grams -- which consists of sapphire glass, a touch screen, a titanium bezel, and silicone bands -- it's not one that will weigh you down.As a multisport watch, the Pro supports runs, hikes, cycling, swimming with structured workouts, blood oxygen saturation measurement, stride analysis, and feedback on whether you are improving your performances and have recovered enough for the next round. GPS, GLONASS, and BEIDOU help map out your current locations if you want to venture off into the unknown for a trail run, and a "breadcrumb" navigation feature helps keep you on track with where you've been. A barometer and altimeter coordination with your heart rate and oxygen recordings to provide altitude acclimatization estimates. You can also use the touch screen to navigate the map screen, and fully customize the main display to get exactly the information you want for a given workout.The battery life on the Pro excels in GPS modes with 40 hours in full GPS, 100 hours in UltraMax GPS, and 30 days in normal watch mode. And it's waterproof to 100-meters for pool and open-water training sessions.