I was there. I can't say it was really that great, but then again I go to Comiket...
The cosplay was pretty nice but they could have done more recent shows; the 5 or so Madoka cosplayers were pretty cool.
The panels (other than my awesome Visual Novel panel that nobody came to) were generally 'meh'.
Most of the vendors were selling things that were clearly counterfeit, and I refrained from hosting a booth there myself after I read that Metrocon does not allow 18+ contest at all.
What kind of an anime convention is ignorant of hentai?!
...I'm still sad that nobody came to my Visual Novel panel q.q