@Zach, Jeff's right about not taking the practice final tests of WTB. Wiley does not provide solutions and explanations, but Becker does. To check the answers after testing is a good supplement for final review as well.
Practice final tests are proven by the majority of the EWS awardees and passers. You get the feel of the actual tests when you tackle the practice sets. Some of the questions, if not most, replicate the actual tests.
I sat 3x in the past and did not have a chance to experience the practice final tests on my very first test either. I failed miserably. On my 2nd sitting, (although still short of 3 to pass) I improved my score to 10 points. That I think was a good improvement, considering I switched to the most tricky part of all, AUD (the part with the lowest passing rate). It's especially more challenging to me having English as merely my second language.
I cannot wait to tackle for the first time my final practice tests about 10 days from now, after having my FAR software since 2012.