Exam 70-698 - is college course enough?

I am about to conclude an eight week course at a community college designed around the 70-698 exam. It is using the Microsoft Official Installing and Configuring Windows 10 book along with Microsoft Online Labs for the homework. Our instructor states that many of the quiz and test questions she gives us are from the cert test itself, though reading around these forums it seems hard to believe. Do you think it would be worth a try to take the test after this course or should I do additional prep work? Should I try for the MTA instead first?
Comments
When I was in community college working on an associates degree I made the mistake of not getting certified in the courses I was taking. I was in a similar situation where the class was using the official Microsoft books and labs. At the time I wasn't thinking about certification I was just interested in passing the class. Had I been more focused and took the certification at the same time I would be much further ahead in my career.
I am trying to register for the exam on Microsoft's site and it is giving me the error:
50041: Sorry, we are having a service interruption and we are unable to complete your transaction. Please contact customer support.
Of course, the customer support link goes to a 404 error page. I have been trying to register for the last couple of weeks with the same results. Is there another way to register besides the registration button on the exam page?