Schoolcast is the most user friendly and dependable product that I have ever used in the area of mass communication. It will literally send out over 10,000 calls in less than a minute. The service department is always accessible to answer questions or to quickly remedy any problems that might exist. The mobile app makes it very convenient for use while out of the office or during an emergency when communication must take place quickly. I would without hesitation recommend this product to anyone who needs rapid mass communication right at their finger tips.