Super easy to install, came with instructions which I followed. It also comes with the mounting hardware etc. so it really was a breeze to put on.
I installed it on my '12 Suzuki Gs500, and it sounds absolutely brilliant. If you've already seen videos of it on the internet, trust me, the videos don't do it justice. The sound is full and rich, and even better than I had thought it would be.
Overall 5/5 would recommend to a friend.
This exhaust is just awesome, the fit on my 2009 600RR was excellent. I couldn't be any happier with the sound and ease of install. One thing to keep in mind, remember to take ALL the bolts out holding the stock muffler in, I left one in the heat shield under the rear seat, 30 mins later realized the shield was attached to the muffler.
Got the full carbon fiber set up for my 2009 Kawi. It was pretty easy to install and once it was done the difference was noticeable.
Yoshimura makes top notch products and this is no different. If you can find the full system I highly recommend it over all others!