Most likely you as a participant of one of our courses will not need this service at all. Since the year 2011 by far the most candidates - approx 99% - passed the certification exams at first try.
Nevertheless, if you like to avoid any risk, you may want to book TAKE2. This gives you the oppotunity to re-sit your exam if you did not succeed at first try. Within six months from the certifcation exam you have the possibility to re-sit the same exam as an online-exam. You are free too choose the specific date and time.
Just for re-sitting the same exam you will not need to book a complete new course any more. If you want to have this option simply book TAKE2 as an addition when booking the course itself.
Enjoy your exam!