Just curious, would you say an ISDN sim would still be worth investing in?
ISDN is becoming legacy. Save ur money for your next cert
I did BSCI after BCRAN after 70-220 after 70- 216, I am running about one a month, which is doable, if you disregard things like having a life, getting enough sleep, lunch hours, etc. and work with a lot of the stuff you are studying.