I liked the trade from the moment I saw him pitch, mostly based on Caveat's observations.
His weight loss/ conditioning have also been a large part. While composed, you could see him physically struggling during long innings or later into the game. His record shows some of his best pitching is done after he gets to 100pitches now. His striking out of the side a couple of nights ago in the 6th or 7th is a good testimonial to that as well.
Todd Coffey might still have the same spurt in him post- baby fat.