Which group of people have had the greatest success with it and why?

All groups (arm or hand prostheses, limited hand and finger use due to injury, arthritis, carpal tunnel syndrome, spinal injury, burn, stroke, cerebral palsy (and many other physical conditions), visually impaired, blind, have autism, or have traumatic brain injury) have had some level of success in using the orbiTouch. Some groups, like people who use prosthetics or have arthritis or carpal tunnel syndrome, have performed best because the orbiTouch was designed specifically to address hand and finger issues. The group that has had the greatest success, however, is children with autism. They learn to use the orbiTouch very quickly and have had some of the fastest typing speeds ever recorded on the orbiTouch. One young lady, 22 yrs old at the time, in Washington, DC learned the complete orbiTouch alphabet in 10 hours and was typing 35 words per minute with it within three days of purchase.