Put this on my 18 WRX and was pleasantly surprised that, as advertised, there isn't any drone on this exhaust. The cold start is quite nice and has a nice tone to it, but once it warms up, it basically sounds like OEM, which is what I was looking for.
When you're driving and you get on it there is no mistake that you have a larger exhaust, but once youre off the gas its just normal.
Be aware that the resonator is large and will hang lower than most exhausts, so you need to be careful, particularly if you've dropped the height of your suspension and/or you have some steep angles / bottom out a lot, etc, otherwise, it looks nice. I chose the chromed tips and happy that I did.
If you're coming from stock, this is a really nice exhaust, I totally recommend it, it's louder when it is supposed to be but without the drone of others (Cobb)