Some people with cerebral palsy (CP) have repetitive or involuntary body movements that cause them to push against their seating supports with significant force. In some cases, these movements cause injuries to the user or damage the wheelchair. Dynamic seating systems reduce the risks of injury or equipment damage by moving when the person moves and then helping them return to their original sitting position. This study uses an online survey and interviews to investigate who is using dynamic seating, how they use it, and their views about its impact on their lives to inform policy and practice.