For me, I find that the Aeria service is good. It's not excellent because there is always room for improvements.
For example, events with a large amount of participants, esp. those that give out free AP. Of course, since it's free AP, there's going to be A LOT of people participating in it. I don't know what could be done, but if the submissions could be dealt with earlier or more efficiently, it'd be nice.
However, on a positive note, Aeria is my favorite game community compared to others I've tried. It may be just the people who play the games, but there always is someone who can help others out, whether in- game , forums or even the shout box.
Also, the games provided by Aeria are lots of fun too, even though I'm only playing 2 at the moment. The events in the games are fun and so are the players (reg. and GMs).
Aeria is like a giant family community (oh..that sounded a bit corny ^^