The application should be working a lot better on new versions of the app (3.1.0+). If you are receiving no reminders at all, please refer to our troubleshooting guide: https://calendarsnooze.uservoice.com/knowledgebase/articles/1838176-no-reminders-at-allgkr100 commented
3.1.01 is working a lot better and I am getting the reminders consistently now. But it has introduced 2 bugs:
1. Email reminders get triggered as regular notifications
2. Changes do not get reflected in the reminders correctly. For example, if I move today's event to tomorrow, the reminders get fired today and tomorrow.