Has the perfect balance between being loud and being quite. Roars when you accelerate and shuts up when you're cruising, it's great for my 2015 Q50 that I drive daily. Only ever drones when slightly accelerating in fifth gear, easily fixed by shifting the gears yourself. Been almost a year and it still makes me smile when I drive. Hopefully it still sounds great when I get some more mods on the car. I couldn't recommend it more.