Just did it online today.
Did about 3 hours of reading, references in the online notes and about 40 minutes for the exam.
Out of 50 questions only about half a dozen actual maintenance questions and the rest about the rules.
You need to know the name of the FAA advisory maintenance circular but dont bother reading it.
I do not think they actually see it, it just appears on your membership record, in my case 2 minutes after the email saying I passed.