I used the Becker course years ago. I didn't study as much as I should have, so I failed the one part I took by 2 points. If I would have studied a little harder, I would have passed with no problem. I thought this prep material was excellent. The recorded lectures were very well done. However, my last employer paid for the material. Now that I will have to pay this time around, I started looking at other options, since Becker is by far the most expensive. I think I am going to go with Wiley, although Roger also received very high reviews.
I suggest you google "best CPA exam prep course", and take a look at the reviews. The reviews break down each study course, and show the strengths of each one. This way, you can choose what works best for you. For example, some courses have better lectures, if you learn better through visual and audio (like myself).