This was an upgrade from the T Rex 3, and it is worth the extra hundred or so dollars. The gold is a nice touch, as well as the flashlight feature. The Zeppelin app works well with this watch and there are too numerous features to list
Watch looks really cool but not syncing with Strava and Training Peaks is a killer for me. It only syncs your work outs from the watch to apps not the other way, so if you record a ride on your head unit on your bike it doesn't show in the Zepp app. So Garmin is still a better option for me.