On Sun, 27 Apr 2008 05:32:02 -0700 (PDT), de_ja wrote:

Does anyone have any first hand experience of these devices, do they
really work?

Along with most other postings I don't think they do as a long term
solution. Mice can certainly hear them and with the model we had so could
I. I know the mice could hear it as they jump when you turn it on but they
don't go scarpering away from it...

--
Cheers
Dave.