I like how easy it was to use, especially since my prior system required me to learn an entirely new user interface/experience! It's been great so far - there are some bugs here & there but they seem to be getting fixed quickly.
Not much yet as we have just started using this product (we previously used a 3rd party service). We've realized immediate cost savings by not having our staff perform manual tasks such as payroll processing etc., which has helped us streamline processes across departments within the organization.