Looks can be deceiving...I 'SEEM' to be many things but I am usually NOT what I appear...??
Many classes, regardless of who is teaching them, are currently falling short of totally preparing one for the exams. With all of the Code changes in D1.1:2015 as well as the changes in the Book of Specifications, weld molds, and adding the new Book of Exhibits to the Part B exam, the test is far different than anything most of the current CWI's and SCWI's are experienced with.
So, you take a class, they say, 'this is what you will need to know for the exams'; WRONG. It isn't even there anymore or it has changed. So, be careful about classes preparing you for the exams. Take a class that teaches you how to inspect and goes through the code books in detail. With that background you will be able to pass the exam AND will be a better QC/QA person.
With the proper background, experience, and advance study the seminar will round you out and prepare you for some particulars that are not able to be reached by self study. The failure curve gets steeper and steeper for those who: do no pre-study, are not familiar with a code book, do not take the seminar, have no inspection experience. The more you are prepared ahead of time, the higher your chances of success.
There are very few GOOD study materials available outside of the seminar for the Part B. You should have some of those if you took the seminar. If not, take it this time.
Brent