My daughter couldnt stand those ultrasonic things, you know the ones that people arent supposed to be able to hear, well young kids have much better hearing than people over 25 and she could hear them, so not good if you have kids or kids visiting.
Once you have tried all the normal solutions (and to be honest a cat or a trap or poison is the best way)
A friend of mine was driven to distraction by mice that she just couldnt get rid of, so she wrote them an eviction notice, gave them 7 days to quit, 'posted' in the mousehole...and I kid you not they left!
A buddhist nunnery in the city I lived in in Australia, had a problem with rats, of course being good buddhists they couldnt kill the vermin, so they chanted 'at' them asking them to leave...and they went!
Of course when I had mice I just laid down bait, but if I were desperate I would certainly try the eviction notice!