I have used a Garmin watch for years and love it. Light weight and find it to be very accurate for front-middle-back distances when comparing to friends using rangefinders. As an 11 handicap, I don't really feel like I need to know more than those 3 distances. A friend telling me a number that is 3 yards difference does not make me adjust clubs typically.
I also periodically use my Arccos system. Sometimes checking to make sure it has recorded each shot becomes too distracting to my round, or maybe I forgot to charge the little device that clips on my belt. I think it is probably a good system if I could get consistent with it.
I also typically will use the free version of 18Birdies. Less for distance info and more for data collection.