My opinion (YMMV):
PDO is down quite frequently. It usually appears to be a load issue.
The state-by-state information is no longer kept up to date. I would avoid relying on that information as it could get you arrested. Remember: ignorantia juris nihil excusat (or however that phrase goes).
Trolls run rampant in the forums, with no moderators to stop them. Then there's the guy who's so convinced he knows best that he posts a reply on every thread with a huge disclaimer directing people to other fora. Plus every other thread is people complaining about the rating system and calling down curses upon a supposed "zero bandit". I'm mostly a lurker, so the rating system didn't bother me, but people on PDO complaining about their ratings became rather tiresome.
Quite simply, it's become darn near unreadable, so I left. I came here where moderators do the heavy lifting of dredging out the time-wasters and trolls, and make my experience both more enjoyable and more educational.
I guess that's a long way of saying, props to the moderators and posters here.
And if you still want to read PDO, more power to you, just bear the previous in mind.