It is (still) the # 1 site for webmaster-related issues for me. The content is way above average quality, also thanks to the strict moderation guidelines.
Looks like it was "developed" in, er, 1996 and was never taken any further. You might want to spend some money on having a new logo developed and maybe have the top of the page (above the message section) reworked to match the new brand.
Declining. Over years I most actively participated in the Adsense forums, but when I removed Adsense from my sites, this was not useful any longer.
The Google SEO forum is still of good value to catch up on the latest issues with Google SEO. The Google business forum tends to be always a bit "late" with news, and a (perceived!) pro-Google bias makes it less valuable to me. There simply seems to be no place here where Google can be constructively criticized which is odd for a site that has such a good reputation.
In any case, I would never pay to get access to the site. It's not THAT valuable to me; never has been; never will be.
What is your OVERALL impression of the site?
A site with excellent content quality, little to no clutter, quite old-fashioned, a number of experts among the users, some biased mods (my perception!), some shills (again, my perception!). Not good enough to make me pay.