The user interface is user-friendly. The app is easy to access and use. The app is very user-friendly. SmartButler is a great app and is very easy to use. Sometimes the app may crash but that is not always the case. It is a great app to use and is great for a small business like mine. But I do not know much about the big-biz side of things. I would recommend SmartButler to a small business like mine. We are a small business that provides services to hotels. We use SmartButler to help us keep track of our clients.