Before it, I had the series 1... that thing lasted me almost 4 years before I went to the 5. I had replaced the battery in it once because my screen popped off due to battery swell, so it was an easy replace and gave me another 1.5 years of life. The 5 is light years beyond what i had in terms of sound quality and speed. You can literally have a good conversation through the watch without having to hold it to your ear to hear. The only other watch I would consider would be the Garmin Fenix line, but you lose so much since Apple won't allow communications back to people from the watch.