Figured I would chime in here.
So I took REG back in October and got a 69. I used CPA Excel. I took a few months off and decided to REG again at the end of January. I used CPA Excel again, and about two weeks prior to the exam I bought Ninja CPA as a supplement. It made the difference for me. In two weeks, here were my stats:
Questions attempted: 838
Average Score: 76%
Trending Score: 77%
Exam Day Score: 79%
I would highly recommend Ninja CPA.