56 people, went 4-2, edged into the top eight, came in second (losing my third game to mana flood vs. Rakdos aggro.)
I played an aggressive Azorious deck, splashing red with a great mana base (2 Azorious guild gates, two izzet guildgates, and a steam vents, and a trnasguild promenade, and an Azorious keyrune)' enough so that 7 times in the night I got to overload a mizzium mortars.
Some notes:
That punisher 6/6 demon for four blows hard, but everyone else seemed to think it was good. I detained it pretty much every turn I saw it.
Vraska did nothing against me. They ticked it up, and I killed them while their tokens sat uselessly. Next game she was a 5 mana creature d, with two life riding on it. Her real problem is that her +1 does nothing, and she only gets her -3 off once. That, and her ultimate doesn't provide much pressure by the time you get it.
Rakdos, lord of riots was similarly overrated, and never really did anything to me.
Lobbed crew was surprisingly effective against me, and others (the first place guy ran 3.)
Azorious arresters awesome (I ran three)
Red in general is almost all good stuff. Definitely my vote for best limited color in the set, followed closely by black.
Detain is removal in limited. Many games at my prere saw 10+ detainings.
Izzet is underwhelming. Or top 8 had two of each guild, except izzet, with the highest ranking izzet player getting 11th.
The set, however, is very balanced for the guilds. Azorious and selesnya seem a little powerful, but really only because of the way they win (tempo control and inevitability). Ot only was our top eight varied, but our top four was every guild but izzet as well.