Just found out I passed my re-take of the PPP! Yes! I had passed MC last time, but bombed the vignette. I spent mucho mucho hours since my fail, practicing PPP vignettes over and over. And over. I can't say how much (I believe) this extra practice helped me on my retake.
The study material I used was the same I used the first time (since I had passed the MC, I figured that had done the trick the first time so .. ) It was Kaplan, Ballast, Kaplan PPP Q& A, Ballast PPP Practice Problems, Schiff Hardin Lectures, this forum, Google+ forum.
Now that I have passed CDS, SPD & finally, PPP --- it's onto 5.0 for me! G'luck all