In the design phase, sometimes the tools for designing Horizon solutions have issues when they're calculating the number of nodes and platforms needed to support the VDI systems. In the past, Horizon had limited compatibility with Windows 7 or 8. It wasn't totally supported and there were problems with that operating system. I was trying to do something with the desktop in that version of Windows, and there were lots of issues. I finally got it working, but the client decided to upgrade to Windows 10, and that was an issue. In the end, the client loved the tool and bought Horizon. Horizon is a perfect tool that's easy to manage, so I haven't had too many struggles. I can resolve any problems easily without spending too much time. I only need to review the limitations and explain them to the clients.