I like that it is easy to use once you've got everything set up correctly.
The reminders are very helpful in keeping track of my appointments! It's also great because we have an app now instead of having people text us when they need something done around our office (which was pretty much impossible). There isn't anything about this program that has really bothered me so far (maybe just how long some of them take), but maybe there will be at another time. We're using greminder mostly for reminder purposes; however, sometimes we'll send emails/texts as well.