Hi @Mary_Alati, I was part of the group that took the original set of courses and spent two years as an online TA just shortly after the courses were offered (2013 - 15). I did take part in, and passed, the beta for the MongoDB DBA certification as well.
I unfortunately haven’t taken any of the recent courses as life has kept me busy, but having the ability to take the courses when I have time will hopefully allow me to check the courses out again.