Now I know by their nature they are supposed to be LOUD and DISTRESSING but I have had to get rid of several because they REALLY upset dd1 (4 years old and rather Sensitive) when they went off. I mean she was hysterical and would be upset for the day. And then I would burn the toast the next morning and it would start again.
I need one that WORKS but is't TOO SENSITIVE or go off on a 'test cycle' when you switch the light on and off (I HATE those ones).