well after a nice run on the country roads/dueler i can safely say i want my one now...
at idle is is a really nice burble but not to load at all
on duel carrige way it was just about as quiet as the standard exhaust
on the country roads witha bit of pace it sound unreal i can only explain it to be similar to an evo but with a slightly deeper tone...

all in all i was extremly inpressed at how quiet it was at a steady pace, and in no way watsoever did it sound "chavy"

role on april
 
Had mine fitted today and am very happy with it. Is only cat-back but does give a nicer exhaust note outside the car, but is not intrusive inside. Can definitely notice the difference inside when giving it full beans though :)
 
Non res is louder. I have resonated as I still like some peace and quiet! It still makes a much better sound than standard IMO.

Both are good, just depends on what your preference is.