On the plus side it is free. On the minus side it is yet another site you have to give an email address too and some information about your life, where you do not know if they will abuse it.
Who knows, if I program in a reminder not to buy snacks from the vending machines at work, maybe they will sell that information and I will find myself getting spam for the latest weight loss tea.
I already program email reminders like this into the calendar that comes with my email account.
Sometimes the reminders work ( for simple, non-threatening things like taking out the trash Tuesday evening ) and sometimes they do not.
In reading the scriptures, there are two kinds of mistakes:
One mistake is to cling to the literal text and miss the inner principles.
The second mistake is to recognize the principles but not apply them to your own mind, so that you waste time and just make them into causes of entanglement.