I had the P (and then the P-SE) for about a year. They still amaze me for their technicality and that they can be driven much easier than most of the flagships. I love the cup design but I wished they had a better headband. For my larger and flatter head top, the headband was unfortunately a fail. I still catch myself thinking about buying them again, but then I remember the headband.Just jumping into this party.......I had a set of P in house for a few weeks thanks to a kind member here and they are officially my favorite headphone for EDM (preferably Ambient or Chill not Oakenfold per say). The Soundstage and impact was as good as the 1266 TC to me but the fitment offered me some of the same issues as the 1266, they just don't fit my head very well.......I would still buy a set at a good price though, really enjoyed them!
P-SE is also very capable and lightweight HP. We still keep it and is my wife's studio desk headphone. It is more comfortable due to less weight but still the same design.
I switched to HEKse, unfortunately. Not due to better sound but better comfort.