My daughter wanted me to pass along her recent experience of FOP.
We are semi-local (live 1.5 hours from Orlando) and my daughter has a weekday annual pass that she uses to regularly visit the park with friends. She has never been a fan of Avatar and has been derisive of the Pandora addition to AK (as only a 'millennial' can be) ever since it was added.
This past Friday was the last day she could use her pass before the holiday blackout, so she went over with a friend who desperately wanted to do FOP. They arrived at AK at 9:30 and got in the regular standby line for FOP by 10am. They finally got to do the ride at 2pm.
Having gone to Disney regularly since she was 2 years old, my daughter is quite accustomed to waiting patiently in lines (I've often said that it was the best tool I could have used to teach her patience) but 4 hours is excessive for even the most patient person. However, when she got off the ride she called me and raved for 10 minutes about how amazing the ride was... and how worth the wait (even the 4 hour wait) it was. I kept expressing amazement that any ride could possibly be worth a 4 hour wait, but she insists that it's the most amazing thing at Disney and that she'd be willing to wait that long, or longer, to do it again. And coming from someone who was not a fan of the Avatar movie and thought that the inclusion of Pandora at WDW was 'monumentally stupid' - that is incredibly high praise.
She wanted me to share with people who doubt that it's worth all the work to get the FP or waiting in the line, that it's totally worth it and to please not miss your chance to experience it, especially if your trip is once-in-a-lifetime.