I like that it is an easy to use, simple app with nice features for scheduling meetings via text message or phone call as well as sending reminder messages in real time! It's also very customizable so you can create your own templates if need be (or maybe someone else has already done this :)).
The pricing model could potentially get expensive over multiple users but at first glance there seems not too much difference between single versus group plans other than more functionality/featuresβ¦