Below average. Mainly for junk user forums with SJW moderators and bad search functionality. It was just redone last year from the very dated site.
Regarding UI/UX the site has really taken a dump. While it looks a lot better than the old site, the functionality of searching for photos is unusable. The old site it was simple, even if it was dated.
The forums, well it's been comical. For years it was plagued by (likely) paid trolls and spammers. I noticed quite a few that are very pro-United Airlines (formally Continental) and would flag a post for anything critical. Moderators would plot against users as well.
Then when they redid the site last year the funniest thing happened - they deregulated the forum signups (which had been capped as they "claimed" there were too many members and were working through it) and then anyone could sign up even after they were banned. The forums got feisty again, and the bullying real posters got fed up and left because of the UI changes and the trolls dissipated literally running off scared. New subscribers who knew what they are talking about ran off the trolls or they stopped posting as much. Either that or the moderators had less control to plot against users because of new management.
These days the forums are still junk and full of fake news but it's fun to read occasionally.