I've checked out the P01 twice at the range--and I really really want to love it. But even though I'm all about the full size 75 series, the compact just doesn't feel right--and I can't shoot it too well (compared to my tuned SP01 anyway--and worse than my shield!)--maybe it's the factory sights, right. My hands are small-average, though I wear a men's large glove size.
Meantime I've checked out the P07 as well--and find it comfortable and natural in my hands--I shoot it well unmodified from the range's inventory. I have a P09, and do best with small backstrap it seems. So, will eventually be picking up and customizing a P07 I think, (or a sphinx maybe if get a bonus at some point?) rather than any of the classic compacts, for carry. FWIW my wife liked the P01 more when she tried both, but she just wants to stick with her full size 75.