I have subscribed to the Standard plan. Normally, we have dynamic requirements - when there is a need we add seats and users. That part is absolutely fine. 

However, it would be really nice if you also add an option to remove user and free seat while removing suers itself. That would save time for users like me from having to go to users - remove and then go again to billing and remove seat. 

Hope you can consider this request :)

Otherwise, loving Calendly.