Kashering a microwave is an extremely complicated process.
Firstly, it is crucial to know: Is hallal kosher? If you cook eggs in a pot that a Muslim never cooked meat in, and then microwaved it, is the microwave treif?
Secondly, you always want to know that a non-kosher person CAN make a microwave kosher. No question.
Additionally, you want to realize that if you boil water in the microwave, but the cup you used was not kosher… you might want to consider doing it again.
But when all is said and done, the kosher microwave is DEFINITLEY the one without cockaroaches….but don’t be jealous!