I have ProPak. Never had P5 or P6. Never intend to. I use DAZ "almost" totally. But I must confess at this point I use ProPak with some items, but only so I can bring them into DAZ Studio in the way "I" want. Once DAZ Studio supports Poser magnets (either built in or plug-in)Pro pak will hit the trash. I love D/S,though it does have it's own set of quirks, they aren't any where near as irritating as the Poser ones "for me". And the Interface wins hands up!!