I submitted the health status part of the check in within 30 minutes of it opening up. I also had an 11:30 check in time in case it only applies to people who had early times anyways.
I just booked mine minutes ago. I had to go to guest services and they told me to contact medical, and there would be a small charge. Looked on here and saw this message. I called medical and booked it, they said no charge. This is for Symphony.