As a vocal supporter of PPS, I must report that I am having some odd problems with version 8. I have reported these, and have received the usual quick acknowledgment from OnOne, so I expect that the issues will be resolved.
One problem I am having is that much of my metadata (all exposure info except ISO, color space, file size) is not reported in the Info pane. This is not fatal, but a problem. This is true for all CR2 and DNG files, and for many JPEGs as well. I am more likely to have full metadata reported for images that have already been edited. OnOne says they have not encountered this before.
The other problem is using PPS 8 with my Wacom tablet. Specifically, when I try to use the pen and the CTRL key to select non-consecutive images, the images I click on are not selected. The name of the active file (but not the image) in the Info pane changes to the last image I CTRL-Click, but the image is not actually selected. It does this whether I use the CTRL key on the keyboard, or the button dedicated to CTRL on the tablet.
I can use the pen and the Shift key in PPS 8 to select consecutive images just fine, I can use CTRL-Click with the mouse in PPS 8 just fine, and CTRL-Click with the tablet works fine in LR. It seems to be something specific with the tablet and the CTRL key in PPS 8.
I hope that OnOne can reproduce this so they can fix it.