Yes indeed the sounds are way too loud. But that applies for all almost sounds in FSX: The sound of the train in Aerosoft’s PANC, the sound of birds in certain Orbx-airports, etc.
Beside that it works well. I have, however, experienced the same problems that were reported here in the forum with enlarged aprons. I have therefore turned the airports where I use add-on airports to .OFF
No everything seems to be fine!