Freak PD has been in my bag for a few weeks now, nesteled in between my teebirds and my orcs. It's become a flip-2-flat disc so I may have to get another and another and another. It'll be a while before it replaces my teebirds though (if evar!)... currently rolling a 12x champ that is very similar to the pd (flip-2-flat) and 2 dx one new and beefy and the other a turnover disc... teebirds are amazing. So, the 12x is on it's way out because the pd matches it shot for shot and can still be stretched another 20'+, for me. I'd be interested in a D-line PD.
Have tried the DD... nothing flashy for me here. To me it flies similarly to a slightly faster new champ Orc. So, I'd just rather throw an Orc. I love Orc!