Similar experience here, not PH level, but better than most "natty" supps for strength/mass gains. I ran it at 6-8 caps, using the Natabolic stack. I bought 3 more bottles of Natadrol by itself to run again later at 8-10 caps.
The only other thing I've taken lately that gives me similar results are bulbine natalensis products. I've used Tropinol, Testalensis, and PhytoSerms-347. The Phyto-Serms delivered the most strength/mass gains of the 3, while Tropinol was better for aggression in the gym.