Fitted mine last week, took a while getting it all lined up. Initially I didn't like it as it felt overly loud and was picking up a bit of resonance in the cabin (this surprised me as my other car is a modified Impreza with a Sports cat and single silencer and it felt louder than that). Within a couple of days it settled down quite a bit and is a lot quieter (less boomy) now.
Has anyone fitted an additional rubber hanger to the spare one that is on the Scorpion system and on the car (mid-section), I know its not used on the factory system but my OCD wants to put one on, on mine the gap between hangers is approximately 100mm so quite a long rubber hanger would be required...