If you like Insteon then this device is a must. It allows for easier configuration and management of all your Insteon devices. You can also use it for management and configuration of other devices as well such as the Schlage Connect Deadbolt (z-wave). One of the best things about the ISY is the support of so many devices as I haven’t had any issues with adding any Z-Wave or Insteon devices.
I use a home automation front end known as Comfort Click in conjunction with the ISY994i. Unfortunately, it does not support Insteon, but it is still a great piece of software for combining everything together in one app; lighting, cameras, security, shades, weather, and climate controls. It is also highly customization by anyone unlike most other higher end home automation systems. Best of all you have the option to use Comfort Click for free! Check out the official website here.