I like that it is easy to use as well as being able to send reminders via text messages which makes them very effective especially when you are traveling and cannot check your phone often. It can be difficult if you do not know how to set up appointments but once you figure it out everything works great! You have to pay per month so there could potentially be some confusion about whether this is something you want to continue using after the trial period ends. We used it to remind people they needed an update from their doctor.