Outside of the instructions being vague (I actually ended up mounting mine differently than the instructions which required some cutting and grinding of the front hangar bracket), I really like this slip-on. Very good price considering the competitions pricing, combined with the great looks it was an easy choice for me. A quick 40 dollar ECU flash at my dealer and very little popping from the exhaust. I waited a year to install after purchasing my bike (Triumph S3) so I could tell the difference in power delivery. It gave me a little more low-end torque and seemed to improve top-end power as well. Easily the coolest looking and greatest sounding pipe out there for this bike.