As an owner of a Forerunner 301, I’m a fan of the form factor. The 301 was my first fitness GPS device, I’ve used it trail running, mountain biking, XC skiing, hiking. Looks like it’s time to upgrade to a 601. This would be an ideal device to record outdoor endurance events like ultramarathon trail running, rucking, etc with a battery life of 48+hrs in GPS mode. No way my iPhone running Strava is going to do that.