I have a WRX Wagon with Borla Hush, Bosal Downpipe and stock mid-pipe. There is no drone in my car. Of course drone is not the same to everyone. You can hear the exhaust in the car, but it does not resonate, and is not annoying in any way to me. I know what annoying is, I have a friend with flowmasters on his Maxima that drones like hell.
I like the extra sound you get from the Borla without having an obnoxously loud exhaust. This is the second Borla system I've owned and I'm very happy with them.