Prostox was the pivotal test in my choice of RP. I was leaning towards SBRT, but the Prostox results put me at high risk for both SBRT and IMRT. I'm almost 3 months post RARP and my continence is almost fully recovered. For me, RALP was the best choice.
BTW, the test cost me nothing due to my zip code. Check with the Prostox company and there's a very good chance that you can get the test free or at a discount.