Seems good, a few times either my phone\app or device has lost mobile data connectivity I imagine so it has seen blank screen eventually saying no internet. When you're tracking something this is a bit worrying as you wonder what's at fault. Once restored map and location history have updated.
Battery is good, used 7% in 5 hours in performance (update every 5 mins) mode. Real time was 3% for 15 minutes so expect a hit on that mode but it should still last a good few hrs....