I love it!!! Little raspy when cold, but once it warms up, it's got a nice deep sound to it. Also, if you are standing in front of the car and someone revs the engine you can here the air whoosh through, pretty cool. Performance-wise, much smoother throughout, more noticeable gains up top. Won't have time to dyno this weekend so hopefully next weekend.
Since I joined the Mercedes club(at first, thought we had to be affiliated with a club to get out on the track at Second Creek) I figure I might as well take advantage of it. They have the track all day Sunday, WOO HOO!!! I'll let you guys know how I fare against the Mercs.