I also got hooked on Garmin. The functionality on my 645m is good. The battery is great. The device is rugged enough. It has it's won GPS, I don't need a phone

I also got hooked on Garmin. The functionality on my 645m is good. The battery is great. The device is rugged enough. It has it's won GPS, I don't need a phone when I'm out running. The best part is it looks good enough to wear to work etc without shouting 'Apple watch or Fitbit'.