The ease of use and the ability to manage the approval process from beginning to end. The support team is also very responsive and makes it easy to ask questions and get answers. I have been using SmartApprove to manage my employee's paychecks and benefits. I haven't had any issues with their service. I highly recommend SmartApprove to other small businesses who are looking for a reliable and easy way to manage their payroll and benefits. It has made the process of managing payroll and benefits much easier.