I have not personally tried them. Talking with those that have, I get the feedback that they are excellent for track days right up to A group runners, but at the high end of that, they start to falter a little.
I used PP and PP2CTs for 2 years of TDs. I never had a wear issue to be honest. How many TD's do you get per rear? front? I just started getting to a point where my lack of skill and willingness to go faster started to meet the limitation of the tire's traction. I bumped up to the PR and PO Race compounds and the issue went away completely, but the life dropped rapidly. (Maybe 2 days of track days for a rear...sometimes only 1 at Tally without a flip as it has 90% left turns)
I guess I say all that to say the Pirelli Slicks seem to last longer than anything else out their at their level, but I have never heard anyone say the PP didn't last long enough and I am not sure the Pirelli will last much longer.
Do you still have tread and are just losing confidence/grip or are you wearing it down completely?