I too have COBB Stg 2 93 octane, and it freaking rocks!!! so easy to use. The downpipe was pretty easy to install, I also have a gutted stock uppipe, which was a bitch to install.
But the AP is soooo easy to use.. just read the manual. I love the AP because I can run an aggressive map, an econo map, STX map (which rocks), and many other maps. ITs very functional. I like it because you dont haev to send your ecu anywher to get reflashed.
I just autoxd with the STX2 map, stayed in 1st gear teh whole course it was awesome. THe power was amazing, spun my tires coming out of every turn.