I like how easy it is to use and navigate through. The customer service at upbook is excellent! They are always willing to answer any question or help with anything. Sometimes there can be some lag time between when I enter something into the system and when it appears on my screen. Also sometimes there will be an error message appear and they won't tell me what it says. If you want an easy to use booking system this is it! We have been able to streamline our scheduling process so much more efficiently than before.