Their labeling is not clear.
"reserve this vehicle" increases the count (i.e. if you need more than one
ECV or stroller) not processes the reservation.
To do the reservation you need to go to the top of that page where there is a little box with an icon that looks like a shopping cart. Click that and you are taken to a checkout page that is an itemized list of what you are "ordering". On that page you click on the button that says "get estimate and checkout", which takes you to another page where you can enter your info in and there is a notice that says an account will be created for you if you don't have one already.
These are screenshots of the buttons:
View attachment 516881
View attachment 516883
They REALLY need to improve the clarity and navigation of their site - it should not be so hard to figure out how to make a reservation.
SW