Twilio is great and all but an SMS or other notification doesn't actually guarantee you a class that's available to all students. A class was sniped from me on

Twilio is great and all but an SMS or other notification doesn't actually guarantee you a class that's available to all students. A class was sniped from me one time while I was still on the confirmation screen. So unlike OP I fully automated the process. EDIT: A notification & response is good for solving a captcha if they have one, if you don't want to outsource that to mechanical turk (or trust their timing / accuracy).