i have the full system on my 1100S and absolutely love it. the sound is thicker than the slip-ons. as far as performance goes, i can only say how it is vs stock. i didn't realize it until i test rode a hyper yesterday and it felt completely anemic and slow to respond compared to my bike. as for the looks, don't judge it only by pictures. it looks great in person, not to mention it takes away a ton of the heat from under your right leg with the pipe being rerouted.Have termi cans on my 1100 at the moment but im tempted to upgrade to the full system.has any one else done the same and was it worth it ? And any difference to sound or performance ?