I use RogerCPA, so I can't comment on Becker…but I also rely heavily on the Wiley texts and question banks (written and software-based). RogerCPA does a great job at getting a person up to pass-level, but I think Wiley really helps to understand the finer points. I think that Wiley is very detailed…but does not include everything…I have had to research some topics from the ASC and SASs, etc. for some topics in my preparation.
I think that in as much as learning the material to be tested is crucial, learning the way the test is written and what the testers expect from you is nearly as important. I think Wiley has the advantage in this area…it prepares you to look for pitfalls and tricks in questions, identify the topic being questioned, look for red herrings (i.e. you think the crux of the question relates to journaling a direct finance lease but in reality it doesn't meet the minimum qualifications of a capital lease in the first place).
I typically use Wiley to read and practice questions, but also to learn the topics to the point where I can feel I can write my own questions and scenarios to practice. For example, on FAR I might have spent two or three days coming up with various non-monetary exchange scenarios (with or without boot) and practice them. On BEC I might create several manufacturing examples in which to calculate equivalent units, or determine the break-even given a multitude of unique scenarios (i.e. inflation rate spike in a foreign country where raw material inputs are purchased and its corresponding effect on contribution margin, supply shock in sales venue causing an increase in sale price, emergency situation pushing fixed costs beyond the relevant range, etc.).
In short, Wiley is very helpful and detailed.