About a year ago I got a 530 and my experience was similar to those related above. Set up was a real pain and it would not stay synched with my phone. I returned it (kudos REI) and bought a Wahoo Bolt. What an improvement. Set up via the phone app was so easy. I've never had any problem with synch and I can see calls and texts on the screen. Wahoo also provides a nice tracking app if you want someone to know where you are.
The Bolt plays well with Strava and RWGPS. I've never run the battery below half, even on slow centuries. tl;dr, I can't overstate how much more user friendly the Wahoo is.