Shrinking Violet, I too read that article today about the cat repeller. We bought a similar thing several years ago, B&Q I think. It cost almost ??50 !!! and done nothing ! Hopefully they have come on a bit since then (certainly cheaper ) and now work. I would certainly buy another one if I hear that more people have bought them and they do work.
It has been wet and windy most of the day. Im sure I can hear those pesky slugs and snails munching on my plants !