So here's my exhaust setup, ZZP Downpipe, ..... all the way to second high flow cat, to resonator, to muffler delete. When I first put on the resonator it got super quiet. I mean this thing does a better job at quieting down the exhaust than the muffler did. The drone was pretty much gone at first, but now it's back. I don't think it's quite as bad as it was with just the muffler, but it's still pretty annoying considering it's supposed to eliminate drone, right? All the rasp went away though so that's good. Overall it's quiet but you can still hear the car if you get behind it.
I'm honestly considering taking it off and putting the muffler back on because though I didn't quite like the muffler either, I thought it sounded great except when you revv it up and then you have to deal with the fact that when it holds revvs it literally just sounds like a noise being muffled not brought down to a quieter level just muffled. Like if you covered your ears but could still hear it . I don't know exactly how to explain it but you have the catback so I think you know what I mean.
Anyway, the best sound I ever had was with just the high flow cat, it sounded like a race car as long as I didn't hit boost. Once I hit boost it sounded like a Honda :| So that was pretty annoying too, even more so considering that I had to park really far at school or when I turned it on everyone would turn and look at me.