Had the Borla version (Borla makes the system for Steeda and also sells the exact same thing) on my 03 Cobra and really liked it, their mufflers have the least amount of drone of any perf catback I've had or heard. It was absolutely perfect with a stock or catted mid pipe, quiet at idle, no drone, sounded great in the throttle but would quiet right down when you backed off to a part throttle cruise. Excellent quality
Then I put an off road pipe on and messed everything up, it was obnoxiously loud. It would literally make people jump in their cars next to me if their window was down and I wacked the throttle
Also, if you decide on this system, make sure to ask what tips are on it. The older versions had their 'intercooled' tips, sort of a funky double walled tip. The later versions have rolled tips which, IMO, look 1000X better