I was especially interested in the system as a communication vehicle for our daughters as you can select words from a list to create a sentence and have it spoken. It did include a regular mouse for some optional uses. I was able to use the system almost immediately upon sitting down. This is so that the camera can focus on your pupil. You must look at things on the computer screen without turning your head.
Most people turn their head slightly to keep their eyes somewhat centered.
The infrared lights can cause reflections on glasses that the camera mistakes as your eyeball. This totally screws up what the computer thinks you are looking at. This takes some concentration and was frustrating. They are working on a system that uses the virtual reality goggles. This will fix the first two problems.