Here's a general breakdown:
Round 1 - vs Mono Black 0-2
This was actually a hard fought game overall though the result doesn't reflect that. I basically just got outrun, a whip won round 2 for him.
Round 2 - vs obscure B/U Cipher deck: 2-0
I won easily but most decks would have, his deck was interesting and an attempt at being original, but the whole Cipher mechanic is simply too slow and packs too little a punch.
Round 3 - vs Maze's End: 2-0
Maze's End is a cute strategy. I raced him and kicked the cap out of it on turn 5 with two Mutavaults and an Alms Beast. Round two was much closer and grinding, but I got out an Obzedat and boarded in a Pithing Needle naming Maze's End. He had other ways to win and walled Obzedat with a Blind Obedience, but I won out in the end.
Round 4 - vs Red Burn: 2-0
In game one I got out a couple of Sin Collectors and also got Se Thoughtseizing in, basically drained him of threats. Got a Desecration Demon out to seal the deal. Round 2 went exactly the same way, hilariously similar.
At 3-1 I made the top 4 cut
Top 4 match - vs Rakdos Aggro: 1-2
I lost game 1, he came out swinging too fast. I took game 2 post-board, putting in Dark Betrayal and Pharika's Cures. I was able to control his board early and often. Game 3 was a toss up. I had h at 2 life with no board presence to my Demon and and Sin Collector. Unfortunately I was at 3 life and he top decked a Lightening Strike. A depressing way to lose but a good match.