I did the trial version of PD12 and found that the WTV file conversion for 720p formatted videos still has that 2 second per hour sync drift between the audio and video tracks that has existed at least since PD8. Other programs do just fine.

Scrolling along the timeline is quite jerky, and it appears as if there is some kind of 'prefetch' activity going as flashes of frames several seconds ahead/behind the cursor location appears as the cursor moves. It is rather difficult to get to a specific frame. Other programs scroll so much more smoothly. (It has been this way since PD9, and numerous video driver updates and program updates has somewhat improved, but not remedied these artifacts. PD8 by comparison was quite good.)

A function that would be useful for me is a 'save file same as clip format' - an expanded use of SVRT or other means to minimize rendering when trying to save a clip in the same format as the original. SVRT does work on some, but not too many formats. Other programs do a very nice job at preserving the video integrity with a 'non rendering' file save across a wider range of formats.

As an owner of PD8, 9 10, and 11, I will bypass PD12.

I didn't check, but PD12, like the previous version, may still do some unwanted companding and equalization of the sound track that cannot be turned off.

PD has such a friendly format and is easy to use. Hopefully some of these items might get some attention in future releases. And thank you to the PD folks for offering up a trial version.

System - Intel i7 2700, HD3000, 256G SSD boot drive and 300GB Raptor HDD running clean install of Win8/64 with no other programs installed
PD8 thru 11 have been tried with various NVidia and AMD video cards and versions of Windows OS's on multiple 'higher end Intel CPU' systems - all with same results noted as above.