My only complaint with the watch is that in the Garmin ads it shows a bright vivid color screen. In reality running the backlight so you get that "look" will drain the battery in less than 2 days. Decreasing the backlight to Garmin's 30% will give you great battery life at the expense of a dark screen. I finally gave up and kicked it up to 40%.
Setting up the activity data screens to display the data I'm interested in was a bit of a learning curve, but now it's pretty easy. And some of the CIQ data fields are great.
I turned off ALL the App, Call, SMS notifications comming from the phone via bluetooth. Bluetooth range is 20-25 ft, so I might as well have phone nearby. Can't actually use that watch to answer calls, or really respond to SMS messages, so why bother. Added more hours to battery life. Gamin can let me know when they have a serious "*** Tracy Phone Watch" and I may be interested!
The "thing" that gets me is not the watch but the Connect-mobile app which runs in the phone background all the time eating battery. WHY? The watch can store days of data and activities. After an activity either turn on BT and start the Connect app, or use the WIFI feature on the watch to upload to Connect-web.