I switched to the Garmin Forerunner 570S from an Apple Watch and have been using it for about three weeks during marathon training. Setup was quick and easy, and the watch is incredibly lightweight and comfortable, especially for those with smaller wrists. I wear it 24/7 for sleep, HRV, and recovery tracking.
GPS locks on almost instantly and has been accurate on roads, trails, and the track. Heart rate tracking has been much more reliable during runs than my previous watch. My favorite features are HRV, Body Battery, Stress Tracking, Sleep Tracking, and Training Readiness, which provide useful insights into recovery and overall health.
The display is bright and easy to read in sunlight, the touchscreen is responsive, and the buttons work great during workouts. Battery life has averaged about four days with daily running and sleep tracking, which is a significant improvement over my previous watches.
My only wishes are the ability to reply to text messages and having the time of day displayed on every workout screen. Otherwise, the watch has everything I need.
Overall, the Forerunner 570S is an excellent choice for runners, marathoners, and triathletes looking for advanced training and recovery metrics in a lightweight, comfortable watch. I am very happy with my purchase and would absolutely recommend it.