Almost the best
I subscribed to the no ad version and I have played it for a long time. Suddenly, an ad for a obnoxious game appeared and would not go away. There was no way to stop it. I deleted the app and reinstalled it and found myself back at the very beginning, losing all of my rating. Now, that ad appears periodically and the only way I can get rid of it is to delete the app and reinstall, starting all over again each time. The next time it happens, I will delete the app and cancel my subscription. Update: it happened again. I deleted the app.