Starting maybe in September I've started having issues. I will add an event to the calendar (which is synced to google), but within a few days the event will get cancelled (w/out notice of course). I can appreciate that the problem stems from Google sync. Nonetheless the problem is serious as it has to do with the chore use of the application. Anyway, I personally still use the app as the visualisation is still way better than Google's. So for me that still beats the major con.