The Vivoactive $250 is Garmin's strong answer to the Apple Watch. By not including a GPS in their initial watch, Apple left a small door open for competitors focused on harder core running and cycling. Why they didn't include GPS I am not sure and we surely will not be surprised in the future by add on GPS battery bands, increased accuracy of synchronized pedometer function to GPS, etc...in the Apple Watch.
I have now run with the Vivoactive for 2 weeks and am very pleased. It has not come off my wrist except for a charge every 3 or 4 days.