Docebo or CornerStone?

I went with Docebo and am happy with the decision. I didn't like Cornerstone's sales process, how I felt they have a cookie cutter approach and would not allow me a sandbox environment. Docebo has endless customizations (you have to pay for of course), they are responsive and take responsibility to deliver on their promises on time. The user and admin interface are both simple and intuitive. I love how they calculate the Active User count opposed to charging per seat. They also have an app for phones (content needs to be formatted for it to look good).  Let me know if you have specific questions, I'm happy to help if I can.