I've been tinkering with the audio set up for a couple years and things were...ok, but always felt something was lacking. But the sound system is 100x's improved now and only getting better. I just had to use the K.I.S.S method and stop trying to jam more speakers in the car...simple active 2-way + sub set up.
So far I'm still really happy with the Roush interior, the extra side bolstering makes a big difference. The leather is getting better since it has finally warmed up! But I still may try to get a little more stretched out one of the days.