Got Forerunner 945 yesterday. connection has serious issue, both connect to ant+ sensor as well as connect to Garmin connect mobile have problems.
It could connect, but then disconnect, it seems follow a pattern like 5-6 minutes off, 4-5 minutes on. I went out for a 1 hour and a half run which clearly show this pattern. the watch version was updated to 2.50 during watch setup. It is very annoying.
From the workout chart you could clearly see it connect to HRM-TRI and then disconnected. Another problem is, the Forerunner 945 wrist heartrate consistently very low compare to HRM-TRI which endup heart rate spike when HRM-TRI got connected. My previous 935 was better than this.