Installation: Simple and straightforward, even without instructions. Used a sawzall to cut 2" behind weld. A little bit of dish soap to lube up the midpipe and exhaust can components, press together, align properly and start tightening clamps.
Sound: LOUD!! I've spent the better part of six years listening to the wet fart stock exhaust, so this can is a rude awakening. I will definitely have to modify my start/idle/ride off behavior for my early morning starts to avoid pissing off the neighbors too badly. Nowhere near as loud as a straight piped Harley, monster truck, or ricer, though. At speed, the sound is dreamy, especially corner roll-ons... 8)
Power: My butt dyno measures 2-4 hp increase, with the mid-range (4-7K rpm) getting the most benefit. Lost around 300-350 rpm in the RPM/speedo sync, meaning 6th gear is doing an indicated 70mph at ~4600-4700 rpm vs 70 at ~5000 with the stock can. I should mention that I have stock jetting, no snorkel, stock airbox, and 15-44 sprockets.
Throttle response: Wow. Smmmoooooth, especially through the midrange. Gone is the slight hiccup at 4500-5000 under brisk acceleration.
Wish I had done an aftermarket slip on (Manufacturer not relevant) sooner...