I can tolerate the sound, but not like many of my friends. They do have the sound turned up to unrealistic levels but...its their layout!
I too, have experience with a PFM sound system and for my money the whistle is the best! Sound does, however, give me a headache after a while. It has done that since I demonstrated a PFM one at a three day mall show, right after they were released for sale. I did the demo for 12 hours a day for 3 days! By the end of the 3rd day, I didn't care if sound advanced or not. Even today, out of 30 locos, I doubt that I will install a personal system again. I have one sound equipped loco, for my grandson. When he's not there, its cut off!